usually after a betrayal angle, the betrayed comes out a babyface.
Pretty much... not sure why there's a question as to whether Seth will be face or not...
Only time I remember a heel betraying another heel and he didn't turn face as a result, was the time Punk screwed over Barrett and kicked him out of the Nexus. But even then, Barrett went to Smackdown as a heel, he didn't stay on Raw and continue to be a heel...