Considering Ryback just lost a world title feud against Cena as far back as last month, what is the logic of him getting a world title shot again so soon? "Hey, you haven't won a PPV match since your first one a year ago against some jobbers, but you beat Jericho by roll up last night, so you're ready to challenge for the world title again!"
Nothing screams filler main event (Cena against two guys he just defeated in one on one matches) quite like that match would.