Paper Mario Wii U seems like it's gotta be coming at some point, but who knows. It worries me that Intelligent Systems doesn't have the capacity to work on an HD Paper Mario game, when they're just now wrapping up Codename STEAM, and working on the new Fire Emblem for 3DS, not to mention doing work on the SMT x FE.
I've love to be wrong, though.
There's gotta be a Metroid game announced at some point. The Wii re-release of MP Trilogy on the eShop should be indication enough that Nintendo knows there is a strong desire for another game in the series.
The Screamapillar is easily identified by its constant screaming—it even screams in its sleep. The Screamapillar is the favorite food of everything, is sexually attracted to fire, and needs constant reassurance or it will die.