Yeah I can't picture Gordon getting a big enough contract with a contender. He'd have to settle for not competing for a title to get full value or, given his recent injuries, over market value. MAYBE some contender could make a buttload of trades and renounce contracts to improve their standing to sign him.
Or, contrary to the public face or just to get away from this rocky chapter in his career, maybe Gordon takes a little less for security to sign with a DIFFERENT contender. Oddly the two best positioned cap teams are the last 2 C's opponents. The Heat have a bunch of sizable cap hits coming off the books (Iguodala, Dragic, Hill, Leonard, Crowder), and the Raptors are taking $90 million off the books just between Gasol, Ibaka, and VanVleet.