Some small lore from the IG live Trish just did: apparently Brian arrived on set at the last minute and was given the deputy role because production didn’t know what to do with him (according to Trish at least). guess that moment of quick thinking paid off.
Brian sure has a knack for showing up at the last minute to these things, huh.
Re: who's coming back for S3, here are my predictions:
Fatty: He's Sam's pet retard at this point and it'll be very interesting seeing how the fish react to him, especially if they're Hollywood hopeful normies from a casting agency like Jet keeps promising.
Vance: During the afterparty on stream, Jet outright said that Vance is (maybe he said "probably") going to be on S3, presumably as a member of staff like in S2. It's worth nothing that after Vance died a hero's death defending the shrine from vampires, he started handing out cigarette deliveries like a staff member would.
Trish: Trish is another one Jet either outright stated or
heavily implied he would bring back for S3, no clue what they would have her do, but Trish is probably the best sport out of all the fish so far and brings positive energy that HECK HOUSE really sucks out of most people. In my opinion she's pretty useless but the wiggers like her and that's all that matters.
Alex Stein: He's been in every season thus far and I don't hate him as much as most people itt. When used properly, he can inject a "real reality show" atmosphere that's sorely missing. He was good at getting the fish to actually do things when he was on in S1 and him doing his show from the S2 house gave the fish something to do and the wiggers could sit back and relax, plus he's friends with Sam so I'm sure he'll come back.
Dumbgay: He's kind of a package deal with Alex Stein, and even besides that he brings a different kind of character to the show than anyone else, that being a loud, dumb, gay, black man. As long as they don't let him get baked out of his mind he can have some entertaining interactions with the fish.
I didn't count people who are or are basically members of production like Scott. They'll all be back.