Biff will eventually appear, or the group will visit Hill Valley.
With a villain or location from every series other than Back to the Future appearing so far in an episode, I must assume that something BTTF themed other than Marty, Doc, or the DeLorean will eventually appear.http://tvtropes.org/pmwiki/pmwiki.php/WMG/BackToTheLandBeforeGothamFalls
FollowingWMG / Back To The Land Before Gotham Falls
Go To