2) A Cameo In Harley Quinn’s Spinoff Movie
Regardless of the many criticisms levelled at Suicide Squad, it seems like everyone loved Margot Robbie’s Harley Quinn. It’s not a surprise then that a solo outing for the character (or possibly a female led team-up movie of some sort) was confirmed to be in the works earlier this year, and assuming it definitely happens, then The Joker has to appear in some form.
Based on what we’ve heard about earlier versions of Suicide Squad, it was supposed to end with two parting ways, but given the ending of that movie, we’ll need to see their relationship touched on in some way.
Whether it’s them breaking up or even working together before parting ways for a spell to give Harley chance to go off on her own, it simply wouldn’t make sense for The Joker not to show up in this movie. Of course, given the way the villain was handled in Suicide Squad, Jared Leto may not be that willing to make any sort of cameo appearance, so it’s at least possible that he could be given a leading role here instead (though it’s hard to say how that would work).
Either way, if and when this spinoff does happen, expect to see Harley’s Puddin’ in some way, shape, or form.