Quote Originally Posted by Midvillian1322 View Post
Maybe havent watched that movie in awhile. Just know he said Manipulating time would lead to branching realities and dimensional openings.
Yeah, I agree. I think the implication is if you don't return a stone or the apple to the right moment after you take it, time will branch.

And there's a rumor of an unfinished scene that was intended for the stinger at the end.

Loki is shown teleporting to Asgard only to have Cap appear behind, "You have got to be kidding me!" Gets knocked out by Cap with the hammer and Cap teleports him back to the lobby, only for 2012 Cap appear from the stairs and knock Loki out again for "impersonating" Steve during the fight, and the stone is shown being put back in the case.