Do we know what prime frame, if any, is being vaulted for voruna?

I dont remember the last time I was actually here for a prime frame drop, so im just curious. assuming theres gonna be one vaulted to fit voruna in, do we know what one it is? have we been informed, or will we find out? my guess is obviously the one that was released whenever the latest (as in oldest, not newest) one was. hell, maybe they add more relics somehow, honestly I hope but I doubt.