8 Sequels That Fixed Movie Plot Holes

8. The Tesseract - Captain Marvel

During the first Avengers movie, the Tesseract was a pretty big deal.

We'd later learn that it was home to the Space Stone, one of the six most important MacGuffins in the universe, but at the time it was just a badass cube that caused a lot of trouble.

The superheroes get pretty angsty with Nick Fury when they find out that he wants the object to build weapons, but they failed to ask a pretty important question.

We know that Howard Stark fished the Tesseract out of the ocean whilst looking for Captain America. So, why did it take S.H.I.E.L.D until the early 21st Century to finally do something with this all-powerful energy source?

The answer to that came in 2019's Captain Marvel.

We meet ol' Tessie once again, this time in the year 1989. It's being looked at by Dr. Wendy Lawson, who is actually a Kree named Mar-Vell in disguise. She's been using the cube to try and create lightspeed travel to help the Skrulls flee her people's devastating war with them.

So there you have it, the Tesseract was being worked on all this time, just not by S.H.I.E.L.D.

Also, it got swallowed by a cat.