#1-Hulk vs The Avengers
Now a lot of us don't like the Ultimate Avengers movie(I loved it) but when the Hulk fought the Avengers, it was and epic fight! I would love to see a live-action adaptation of that. Not like I want him to be the villain, I just want them to fight the Hulk
#2-The Hulk Buster
The iron suit used to tame our rampaging Green Goliath, what's not to love about it? Also it would be bad ass to see a live action Hulk-Buster.
#3-Loki
It's his fault they assembled, so he deserves to be in the movie
#4-References to or appearing characters
I want to see
Luke Cage
Iron Fist
Spider-Woman
The Pyms
Ultron
Vision
Black Panther
Dr. Strange
or Sentry
Personally if I could only see two of those characters, I'd pick Hank and Janet Pym
#5-The Avengers Mansion
Where else will there headquarters be
#6-The Helicarrier
To see that giant epic flying base would just make my life feel complete
#7-Masters of Evil
With every positive there is a negative and the Masters of Evil would be a great negative
#8-The Avengers West Coast
If we have these Avengers, the team would just multiply and we would have many characters to introduce.
#9-The Kree and Skrulls
This would make the movie(s) even more epic with these two races coming to Earth with our mightiest heroes assembled. If we have the West Coast Avengers than we would have a war
#10-Make it a Trilogy
You can't just assemble these heroes for one movie, I want at least three because the story telling could go so far.
Well that's just what I would love to see.