The tour would more importantly get him paid tho. This is a pretty long tour in some huge arena type places. I wouldn't be surprised if Future was expecting over a million in a half after its over, and he signed a contract before the tour started I would definitely sue.
maybe there was something in the contract that allowed drake's camp to kick future off for any reason at any time.
but maybe not. idk contracts. but its just like, opening for a dude like drake is a privilege, not a right.