Arin's the one I've been betting on for years. He's a degenerate with an even more degenerate fan base that has been pushing gay and troon shit for years, and he has an SJW wife. Add the fact that his "career" has been on the decline and you've got the perfect recipe for trooning out.
That said, I'm 50/50 if Suzy would support this. On the one hand I could see her being supportive and gushing about how she's totally a lesbian now, but I could also see her not wanting to validate her ""wife"" 24/7 and divorcing him right after he troons out. She appears to be doing better compared to Arin (She's in shape and appears to be doing well selling her art/jewelry shit), so I could definitely see her leaving Arin with hopes to find a man that has a stable job and isn't slowly turning into a fat blob.
edit: Although to be fair, Arin did drop some weight for Creator Clash, I doubt he'll keep it off and continue getting in shape now that it's over.