What if the Avengers were younger and added a new life to an Avengers movie?
Steve Rogers/Captain America:
If you've seen Kingsman: the Secret Service you most definitely know Taron Edgerton. He can absolutely get the physique to hold up the Captain America mantle. He already has the looks down. I believe he has what it takes to play the Patriot we've all come to know and love.
Bruce Banner/the Hulk:
Miles Teller will already be playing one of the Marvel universes greatest minds in the upcoming Fantastic Four movie as Reed Richards, but that doesn't mean he can't one of the MCU's greatest minds either. After seeing Whiplash you'll without a doubt know that this man has acting chops and can hold the emotional states that Bruce Banner goes through.
Theo James definitely has the looks to make him believable as the god of thunder. He can show that he won't take anyones crap and that he's skilled in combat. He has the acting talent to show that he's a god and more powerful than anyone around him. Just let him grow out his hair and give him a hammer, he'll do great.
Natasha Romanoff/Black Widow
If you are a fan of Game of Thrones you know that Emilia Clarke can play one hell of a BAMF. Even with most of the bad ass things she does in Game of Thrones is more psychological than physical, but with a little hair dye I believe she can still practice and learn how to fight like Black Widow and be a BAMF once more.
I want this version of Hawkeye to be the partially deaf wisecracking Hawkeye. Not the MCU version (I don't blame Jeremy Renner). And I think Dave Franco can fit this profile perfectly. We know that Dave has the physique for the character. He can also be a great person to bring the humor to the archer in the MCU.
Tony Stark/Iron Man
I don't much about this actor, all I know is that he looks the part and can most likely hold the part of Tony Stark and Iron Man. Just slap on the Stark goatee and he's good to go.