"If The Outcasts beat one tribe, that tribe will have to go to Tribal Council and vote a player off. The Outcasts will then vote one player back into the game. If the Outcasts beat both tribes, Morgan and Drake will both go to Tribal Council and both vote a player off. The Outcasts would then vote two players back into the game in that scenario. If both Drake and Morgan win, The Outcasts' chance to get back in the game will be forfeited." ~ @SurvivorWiki
None of them will be replaced by outcasts.
The Outcasts wins immunity!
This means that
One outcast will then join the game.
Proceed to tribe events.