#1 A feud with Dolph Ziggler
OK, just kidding.
#1 A feud for the Intercontinental or United States Championships

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Now, we're not saying that he's going to win either of these (although that's certainly within the realm of possibility), but it's been tradition to groom - for lack of a better word - a future main event star with a run with either of these titles or, at the very least, a program featuring him and the champion.
Yes, he's on SmackDown and that brand has the Intercontinental title (for now), but when has that been a hurdle to anything before?
If Black is going to set himself up as a dominant force in WWE, he's going to need to go after some gold. He doesn't necessarily need to win some right away - in fact, establishing he can be beat (even by nefarious means) is important unless you want to get him into that whole "winning streak" corner WWE paints a lot of these new guys into. But making him at least a contender for some gold adds some credibility to his character, which will go a long way towards carrying him up the card in the future.
These are only five possibilities creative can do with Aleister Black now that he's on a singles run on SmackDown. What do you think is next for him? Share your thoughts in the comments.