Oh man, that'd be soooo awesome if we ever did xD but I doubt we'd ever get permission from the big bosses at Disney *grumbles and shakes fist* D: 

To your ideas, they all sound like good starting points! As far as the interlude goes, it'd make sense for them to hold some sort of memorial service for Voldon back at Zinuthra perhaps? Since he was so important to the Qyaari as a whole? 

Then I guess we can connect to your other plan of them trying to decipher the Voss visions, perhaps eventually this leads to a discovery of BIG anomalies in Force energies deeper into Wild Space, that could be the result of some of the Rakatan devices from the Infinite Empire that they have been gradually rebuilding? 

Maybe they end up on that old Rakatan homeworld from the Original KOTOR, which is less populated or perhaps abandoned in favour of a bigger planet, which Ago and Bol begin to explore and somehow end up being led to Revan and Exile's current location through their findings there? O.o

Definitely yes to the world building for this other planet, what sort of planet do we want to go for with this one? XD