Conduit 2 was formally announced last week by Sega, and High Voltage are returning as the developers. However, they've stated that they're still unsure about supporting Wii MotionPlus in the game.
Speaking to Nintendo Life, High Voltage said "We're still evaluating it [Wii MotionPlus] for Conduit 2, but any integration wouldn't be mandatory and would serve only to supplement the core experience."
High Voltage also confirmed that the game will be remaining a Wii exclusive, and that it should be seeing a release around the end of this year just in time for the holidays.
Source: Nintendo Life