Loki's Bootstrap Paradox: Did Saving the Multiverse Erase the Moment That Created Him?

Every time-travel story eventually asks the same dangerous question: what happens when the loop has no beginning? Loki's entire arc — fugitive variant, TVA prisoner, and finally the god quietly holding the multiverse together — starts at one already-confirmed moment inside Avengers: Endgame's 2012 time heist. If the Loki who now maintains that structure ever reorganizes the exact branch where his story began, he doesn't just risk a plot hole — he risks a bootstrap paradox, an effect erasing the one cause that let it happen. That's the seam this theory pulls on.

How Loki's Story Actually Begins — Inside Endgame Itself

Strip away the jumpsuits and pruning staffs, and Loki's origin is almost embarrassingly simple: during the Avengers' 2012 detour in Avengers: Endgame, the plan to recover the Tesseract goes sideways, and a variant of Loki grabs it in the chaos and vanishes. That single, canonical moment creates a branch that didn't exist a scene earlier. The Loki the TVA arrests in his own show's opening minutes is that branch — meaning his entire arc exists only because of something that happened inside Endgame, not anything he chose.

From Fugitive Variant to God of Stories

Two seasons walk that branch forward: arrest, recruitment, the unraveling of He Who Remains, and the Season 2 finale (recapped fully in our ending explainer), where Loki destroys the Temporal Loom rather than accept a binary choice between one Sacred Timeline and total erasure. Instead he holds every branch together himself, alone, at the end of time — restructuring the tangle into the form the show visualizes as Yggdrasil, becoming the God of Stories (branching mechanics explained here). The load-bearing fact for everything below: present-day Loki's authority over the multiverse is causally downstream of a branch he didn't even create on purpose.

What a Bootstrap Paradox Actually Is

A bootstrap paradox is what happens when an effect becomes its own cause, with nobody standing at the loop's beginning. Classic version: a time traveler hands a novelist next Tuesday's newspaper; using it as a guide, the novelist writes the exact article that later gets published — the one the traveler brought back. Nobody ever actually composed it first; it's a closed loop with no first draft. Apply that shape here. Present-day Loki holds the multiverse together as Yggdrasil, which by definition contains every branch, including the 2012 Tesseract branch that made him who he is. If reorganizing that structure ever folded that specific branch back toward its split point, the branch that created him stops existing as distinct — and with it, the TVA arrest, the show's plot, and the Loki who did the reorganizing.

A loop with no first draft is still a loop. It just doesn't have a beginning anyone can point to.

The Theory: Did Restructuring the Branches Tidy Away Their Own Foundation?

Here's the speculative leap, stated plainly: this is a theory, not a plot report, and nothing confirms Doomsday engages with it. But the show's language is specific — Loki didn't freeze the branches in place, he restructured them into a new form, and restructuring implies change, not preservation. The 2012 Tesseract split is structurally one of the newest joints in the whole tree: a branch only a handful of years old, grafted onto the trunk near a point — the Battle of New York — both realities share. Older branches have had decades to settle into their own shape. The 2012 graft hasn't, and a restructuring event smoothing young joints before old, load-bearing ones is exactly the risk.

Why This Isn't Just Time-Travel Trivia

This matters for Loki's authority, not just his backstory. If the branch that created him were folded away, the paradox wouldn't announce itself — bootstrap paradoxes are quiet, since the only proof one happened is the loop continuing to run, unnoticed. Nobody inside it would necessarily know, Loki included. That's what makes this genuinely existential in the literal sense: not high stakes, but whether the chain of events that makes Loki's presence make sense is still holding underneath him.

Where Doom's Incursion Could Pull the Thread

A collision, almost by definition, needs boundaries to collide against — meaning whatever drives Doomsday's incursion already operates at the scale this theory needs: the seams between branches, not the interior of any one. A newly grafted joint under that pressure is a more plausible failure point than an old, settled one. If those mechanics ever brush the 2012 seam — as a weapon, on purpose, or as collateral from forcing three universes into contact — that's the moment this theory turns plot-relevant. Worth separating cleanly from the site's other major Loki-Doom theory, which argues Doom took Loki's power directly: this isn't that, and it needs no on-screen confrontation at all. The danger here is structural, not personal — a fault line built into Yggdrasil the moment it was assembled from an accident, whether or not Doom even knows it exists. He wouldn't need to steal anything, just apply pressure in the wrong place.

The TVA-Shaped Silence

If any organization here would notice a joint like this straining, it's the one built to police branch points for a living. What the TVA actually is now, post-Loki, is a reformed agency working from O.B.'s rewritten Guidebook rather than Kang's old pruning operation — but reformed doesn't mean blind. Yet the TVA is nowhere in Doomsday's marketing. We've argued elsewhere that this silence is itself a red flag; a paradox seam at Loki's own origin point is one more reason it should feel uncomfortable, not reassuring.

What Would Confirm or Kill This Theory

This is the honest part. Whether Hiddleston even appears on screen in Doomsday remains genuinely unresolved by this site's own reporting, so a lot of this may simply never come up. A few concrete things would move it from theory toward something worth taking seriously — or rule it out entirely.

• Confirms it: the plot ties the incursion or its "existential" stakes to the Battle of New York, the Tesseract, or 2012 specifically
• Confirms it: any on-screen sign that Loki's memory, timeline, or authority is unstable or incomplete
• Confirms it: the TVA appears in the film, especially investigating a branch point rather than a person
• Kills it: Yggdrasil is shown to hold branches exactly as they are, with no reorganizing or grafting involved
• Kills it: the 2012 branch point turns out not unique to Loki's origin — a redundant cause makes the loop far harder to break
• Kills it: Doomsday ships as a pure collision story with zero timeline-mechanics content — the likeliest outcome, by this site's own reporting

None of that makes the loop less real as internal logic. Loki's story does, provably, begin inside Endgame's own events, and a bootstrap paradox is a genuine property of any system built that way. Whether Doomsday ever pulls on that thread, on purpose or by accident, is still entirely open. Consider this the sharpest open question in the site's Doomsday coverage so far — not a confirmed answer.