I think Alex will because he is the "cute guy" who didn't do anything to overly offend viewers.
Personally, I think I think he would be a waste: utterly dull and wouldn't shake up the house very much. I'd rather Amanda, Jen or Parker come back. Jacob would stir things up, but he would probably be clumsy about it just like the first time (starting ish about Parker) and get voted right back out. I'm done with Allison so she can stay gone