Okay, a PC port is a bit of a misnomer. Our biggest concern with a PC version has always been losing the experience that is tailor-made for the Wii U. So we wouldn't be porting the game, we'd be revamping it to fit the PC platform. Our solution, as detailed in the stretch goal's description, is to set up a connection between at least two computers (up to 5) - one acts as the gamepad, and the others are players on the field. This would also require voice chat if you're playing online.
That stretch goal is all fine and good, because it details the multiplayer version of Hex Heroes on PC.
We have announced a PC version that will be available immediately when we reach the initial goal. This version will have the single player modes plus local co-op for up to 3 players, all on one screen - the gamepad view takes the bottom portion of the screen, and the top half is split between two players on the ground. You can find a mockup of the PC version here: