Bob Iger said something about liking Star Wars on TV, and it being perfect for DisneyXD. They wrap up TCW with S5 and use it as a jumping off point to continue that idea on DisneyXD, same animation style, same creative team under Filoni, probably picks up Ahsoka's story after the Jedi purge with her as one of the only three Jedi survivors.
TCW has already been setting up Luz and possibly little Boba Fett as characters for a future series that deals with the dark days as the Rebel Alliance takes shape. Luz in particular seems like he'd be an integral part of that story. It practically writes itself.