Supreme Bum 01
Bob-omb
I haven’t played Color Splash myself, but my general understanding was that the gamepad usage was more or less trivial. Unless I missed something, it seems like one of the easier remaining Wii U ports to me.
Color Splash's touch screen controls are cumbersome and they would need to rework it and the UI. Also the game sucks and the reception was poor so they would need to redesign the gameplay to even bother re-releasing it.