I think it should be a straight one-on-one - Trips has had gimmick matches the last 2 PPV's, another would be overkill. Also it's their first one-on-one in quite a while, just shoving it into a cage / cell / no DQ would be rushing it.
I'd be surprised if they rush Orton back, they rushed Candice back too quickly, only for her to re-injure it. I can't see them taking the saem risk with one of their biggest stars.