Strawhat-Heart-Donquixote Alliance

Guys some months ago I predicted that Doflamingo will join the alliance in order to defeat Kaido, I think I was right. Remember back in Punk Hazard when Doflamingo out of nowhere talked in Momonosuke's head and told him to get a hold of himself and Momonosuke panicked ( http://www.batoto.net/read/_/137256/one-piece_ch685_by_mangarule/14 )? What if DD put some kind of mind control device in all of the Smiles and he is giving Kaido all of those men with DF's in order to turn against Kaido when he's not expecting it and take him down. Ofcourse an alliance with 2 strong crews would be really helpful to defeat an Emperor and probably take his place.