#1 Brock Lesnar vs Dominick
Another storyline that could happen sometime next year is that of Brock Lesnar and Rey Mysterio's son, Dominick. Dominick, who was assaulted by Lesnar a few weeks ago, following which the current WWE Champion feuded with Cain Velasquez and then Dominick's father, Rey Mysterio.
Dominick was involved in the WWE Championship match between Mysterio and Lesnar as he came to the ring with a towel, perhaps hinting at "throwing in the towel" on behalf of his father.
He then low-blowed Lesnar, following which he and Mysterio landed a 619 on the WWE Champion, and then Dominick finished with a frog splash. But it wasn't enough for Lesnar to be defeated.
It's quite clear that WWE want to see Dominick in the ring, with reports suggesting that he has been training at the WWE Performance Center. We could see a match between Lesnar and Dominick sometime in the future, perhaps in 2020, when the younger Mysterio has learnt the trade a little better.