It seems like eventually they'll all get to the resort and the billionaires will start NTRing the five protagonists. At least that's my guess.
As an outsider who's only played part of Summer with Mia and none of the other games, this seems really dumb. Way too much time is spent establishing how this fits into canon and what route it belongs on, etc. etc. Just Freddy vs. Jason the shit out of this, say it's non-canon, and open it with the characters winning a trip to the resort or even arriving at the resort and meeting each other.