I don't think it'll be full time. Perhaps he's feeling better than he thought and wants to get some more money while he can. Or, by working on a PPV or two that isn't WM, he can put someone over without damaging "The Streak". Potentially losing to the Shield at ER elevates them into prime time players (pun intended), while not tarnishing Takers legacy, and he pockets some good money in the meantime.