Either way, voice acting conflicts with said actress has hardly ever stopped a character from appearing. As I said, they can recast in the unlikely event that the price is too high...which it probably isn't because you're dealing with contracts and the guilds (I.e screen actors guild).
If they can recast Harley Quinn (Arleen Sorkin - who had been voicing her since 1992) then Jaesa recast would be virtually nothing in comparison.
If anything is stopping a reappearance it's the mechanics of the game itself...