They definitely need to do well, The Conduit more so then Madworld. Madworld could fall into the niche category and not perform to the highest of standards because it's not an easily accessible game. If The Conduit garners strong reviews, it needs to sell well, and quickly, to prove that the Wii hardcore audience will show up.
My Games of 2011:
The Legend of Zelda: Skyward Sword
Elder Scrolls V: Skyrim
Super Mario 3D Land
Uncharted 3: Drake's Deception