Junction Point seem to be looking towards Nintendo's new system.
http://www.nintendoworldreport.com/rumor/29228
A rumour that hints at Junction Point's Epic Mickey 2 having some compatibility with the Wii U was recently posted on Twitter.
The post mentions that the developer is "implementing Wii U support for Epic Mickey 2." It is unclear weather this simply means a Wii version will have some sort of Wii U mode, or if this means they could be working on an actual Wii U version of the game.
While the game hasn't been officially announced, it was revealed in first in a marketing survey and later in a Disney newsletter. The game is expected to come to Wii, Xbox 360, and PlayStation 3 this fall.
It's always tricky to release a game on a console that is dead but has a huge fan-base vs. a new console that will be desperate for games.
I would ALWAYS pick the new console, because it might be risky but the product will be better and it will be better to be one of the best launch games than best last games.