Unless im blind im not seeing in the rules that the person that actually claims takes first turn next round, only the person that controls it.
I also do not see anything preventing card effects from taking the battlefield after someone claims, with the exception of actually claiming normally.
This simply feels...wrong. Lets say my opponent claims and i still havnt activated this guy yet. I activate him and take control of the battlefield, and while i dont get the claim ability i still have control of it so i go first next round.
I must be missing something that hands it back to the person that claimed....