Remember that Sony hack, where an email popped up with Captain America: Winter Soldier directors, the Russo brothers, mentioning negotiations for Spider-Man to take part in Captain America: Civil War? In that exchange the Russos came up as possible directors for the next Avengers movie(s), the two part Infinity War. What about Joss Whedon we all wondered? Well, maybe Joss happened.
From a recent interview with Empire Magazine:
I couldn't imagine doing this again. It's enormously hard, and it be, by then, a good five years since I created anything that was completely my own. So it's very doubtful that I would take on the two-part Infinity War movie that would eat up the next four years of my life. I obviously still want to be a part of the Marvel Universe - I love these guys - but it ain't easy. This year has been more like running three shows than any year of my life. It is bonkers.
If he's holding out for more money, Marvel - give it to him. Not that I mind the Russos, Winter Soldier was amazing, but it's nice having a slightly different tone between the two franchises with Civil War on it's way right before Infinity War kicks off. I also find it odd that Whedon helped set up this "trilogy," but wouldn't want to see it through. But, maybe it's not the money or the concept, Whedon could feel like he's ready to move on, much as he did after the first Avengers. Hopefully after he takes a vacation he'll be ready