You might as well try to do the astrophysics on how all of the Infinity Stones of an entire universe ended up in a single galaxy.
It crossed my mind. In the comics, they occasionally (or maybe frequently, I'm decades out of the loop) make a point of how Earth is special in various ways. But even though I love a good explanation for an inconsistency, they're better off ignoring this, along with:
- why everyone speaks English, even though other languages clearly exist
- how quickly everyone gets around the galaxy in regular old spaceships (less than a day from Earth to Titan, from Asgard to Titan, and from Asgard to Nidavellir). Even though it's been made clear in earlier films that shortcuts are necessary (Thor supposedly couldn't get to Earth without the Bifrost at one point, Guardians needed face-melting portals to get to Ego). Hell, even the Bifrost barely got Hulk to Earth before Thanos' Children from wherever they had their donuts parked.
But, just like Game of Thrones and its teleporting armies and key characters, when a story with this large a cast gets moving, characters have to be where they're needed, realism be damned.
But if you think Hulk ain't taking back that power throne in the next Avengers, you crazy. He's been getting Worfed way too hard these last few movies.
I can't wait. A "holy shit, Hulk is still the strongest" moment will be most welcome. I appreciate them paying attention to his multiple personality disorder, I really do. But Hulk isn't Hulk unless he outclasses everyone else in strength. Give him a chance to show it.