Alright, so here we go:

-After poking around a bit on the interwebs, I think it might be good to have Odessen as the place where Revan and Meetra first go. According to the Wiki and the storyline of KOTFE, Odessen is a "balanced" planet. Why that is...no source can explain, BUT I would assume that the True Sith would have wanted a place to build their very first academy. A "balanced" planet would fall in line quite perfectly with their goals and be a good place for Revan and Meetra to not only visit first, but set up camp. 

-Zakuul would be the next obvious destination, but I would think the party would need a way to get there. I THINK what might be cool would be for Val to capture the Commodore(a la KOTFE?) and have the party imprisoned. From there...well, how do you want to handle Revan and the Exile? We could go at it from the standpoint of the duo being alive, but advanced in years and commanding a sort of secret rebel order behind and around Val's back in an attempt to overthrow him. 

OR

Revan is alive, but Meetra was captured/killed by Val(or other way around)

OR

They're both dead, but they managed to reach Odessen and Zakuul, gather together Force sensitives and train up a secretive sect of True Sith whose main job is to bring balance to the Force by overthrowing Val. Obviously they haven't been doing very well and the order is hanging on by a thread, but the Qyaari might be able to inject some new life into their order to finally topple Val's empire. 

What say you so far? 

Edit: I DIDN'T EVEN SEE THE TRAILER UNTIL JUST NOW AND I NEED TO WATCH IT SO EXCUSE ME FOR A SECOND WHILE I...

SECOND EDIT: WOW THAT LOOKS SO GOOD