I think that it will be involvev the team 7 together and the juubi on the background...
I think it can go either way. For example if the team 7 fight is only going to be for one volume, then I agree with you. If it's going to continue for more than one volume, I think we might be lucky and get a Sakura volume cover (But yeah, the chances of Sakura volume cover are probably going to be low )