Re: LEGO Rebrick Contests
I'd assume that you shouldn't use parts of easily recognizable minifigures from 3rd party themes, such as Tony Stark's. You might be able to use parts such as the heads of characters that are typically covered with a beard (think Gimli from the LOTR line); you could comment on the contest page to see if you get an answer.
Also, I believe the videos won't actually be featured in the movie, unlike the LEGO Movie Contest a while back. They will be included in a special feature in the DVD release, which is still pretty cool.
Thanks for replying! I ended up featuring about four characters, three of which are liscensed LEGO DC Universe minifigs.
@MB Studios: I don't know, I think the BRAWL results speak for themselves....