The thing i hope they do well is trying to balance the comic sci fi elements along with the movie realistic ness element.
take for example the x men films. i think while they ultimately declined in quality after bryan singer left the franchise. the movies did a great job of presenting superpowers on screen in creative-ways.
kevin feige has said that he wants to take the ensemble of characters and take the action to star wars level. which will be alot fun.
so basically they need to try to use a much of the comics as possible in acton sequences but maintain a good team dynamic with the dialogue.
tony stark, thor, bruce banner, captain america and Nick Fury along with Black Widow and Hawkeye seems like a interesting mix of superheros with egos.
and even more imporant are the bad guys. i mean with the roster of heroes we need some really bad ass vilians. its gonna be hard.
so i hope to see drama in the sense that there is team conflict but presented in an entertaining way, but ultimately the team puts their differences aside and use their powers to stop the bad guys.
so i hope to see power fusions. meaning i hope we see superheros combining their powers in creative ways to defeat bad guys action wise
but make the movie a film that the average movie goer can understand the film and like it.
http://www.youtube.com/watch?v=26qd-_11IHY
but lots of people are saying that the animated cartoon is giving us an idea of what we might see.
http://www.youtube.com/watch?v=foGy9MmQ_Dw
but this team up film could be a real cinematic classic. it could surpass dark knight possibly. but just as a film it should be a movie that a non-comic fan could look at and enjoy.
as a sci-fi film it needs to be a classic.