Continuity mistake: Doc Ock is supposedly from Spider-Man 2 yet here he's gained a sweatshirt or turtleneck whereas in that movie he didn't have one. It's made clear he was pulled from his timeline just before his death, so he should be wearing the same thing.
Continuity mistake: In addition to the sweatshirt or turtleneck, Ock's wearing the pair of sunglasses he wore for the bank robbery. Impossible as those were broken by Aunt May. He should've had on the other pair he wore late in the movie.