Huge surprise!! The six pieces of character art that were revealed by Capcom for Marvel vs Capcom 3 are not just studio artwork, they are actual in game character models!!
From the Marvel vs Capcom Twitter:
The character art you see around teh interwebs is NOT key art. Those are in-game character models! SUPRISE!
Big thanks to Lexxxington for the tip!
See the other six character images in this article.
Source: Marvel vs Capcom Twitter