I'm not mentioning what happened after Solana returned from Tribal because it was pretty much as obvious as ever.
Solana just started a fire and talked about how their screwed next time they go to Tribal.
All of the tribes return to the beach for a special announcement. "Eyo, so what's the announcement?" Beat says. Jeff reveals that the twist is a tribe swap also saying that Solana is no more, and everyone is either literally dancing or fucking pissed.
So yep, new tribes
New Appari:
Monika
Roy
Korrina
Sans
Beat
Viridi
Duck Hunt Dog
New Luzon:
Aiai
Ken
Twintelle
Tharja
Junkrat
Tracer
Kid Cobra