The champion that will defeat Aurelion Sol
We now know four out of the five Mount. Targon champions. Most probably assume the 5th may come at a later date, but with the sheer power Aurelion sol brings to the table even requiring three aspects to somehow defeat him don't you think they might need just a little something more? Well according to most fairytales who is it that regularly defeats the mighty dragon? THE KNIGHT but not just any knight THE GEM KNIGHT! 
P.S. Tarics rework was confirmed to come after the newest champion so just a little boost to add to my fantasy.