While Marvel vs Capcom may not be as comprehensive a re-release as the recent SSFIIHD - it's more of a straight-up port - it's still getting a few graphical improvements.
You'll be given the option of playing the game in three graphics modes: Classic, Smooth & Crisp. Classic is as you'd expect, the original Dreamcast pixels. Smooth throws in 2x bilinear filtering, while crisp goes one better and goes for 3x bilinear filtering.
You can see a quick comparison up above, or for some full-size screens, hit the gallery below.