WayForward's Matt Bozon has confirmed via Twitter that Mighty Switch Force! 2 will indeed be coming to the Wii U around about October 2013.

As the original Mighty Switch Force! HD featured completely new graphics, brand new hyper stages and remote play support, we can assume Mighty Switch Force! 2 will contain the same. The 3DS version of the game is already available via the Nintendo eShop, however this version will be worth the wait for those wanting something a little more extra.