Nicalis and Edmund McMillen are currently hard at work finishing up development on a big expansion for The Binding of Isaac: Rebirth called Afterbirth+, and its due out in the spring of 2017.
It's already confirmed for PlayStation 4 and Xbox One, but it seems that the upcoming Nintendo Switch will be among the targeted platforms as well. The developer posted an update on their blog stating the following:
"Expect Afterbirth+ on PlayStation 4, Xbox One and one more console. Sorry no PS Vita or Wii U versions. Date? Spring 2017-we're already working on the console versions."
Now, if the mysterious third console is neither Vita or the Wii U, that's sort of that isn't it?