Update: The "other guy" involved here was Ike Haxton.
However, it is unclear whether Haxton simply fronted the money to Jetten for Dwan's 50%, or if he owned the other 50%. It's also not clear why the money is owed to Dwan regarding Haxton, and not Jetten.
Furthermore, Viffer tweeted to me today that Jungleman "made $1.4 million off Dwan in that match, out of a maximum $1.5 million possible", and that Dwan made out great given that the match wasn't even half over yet. His point seems to be that Jungleman wasn't as screwed as he appeared to be.