Seconded!
Still, Obi-wan at the center of his own movie still seems like a stretch... I could see him in the background but not at the center of his own film... if the movie was all about him, what would he be doing, practicing his Krayt Dragon calls? If SW:Rebels has shown us anything is that if he does something too substantial, jump ten feet in the air, levitate a pebble, or flash a lightsaber at a bad guy, he'd have inquisitors all up his ass in a heartbeat.