If MtGox halts trading, settles all pending BTC exchange transactions, return all fiat deposits, and then intentionally never returns any BTC, does one have any

If MtGox halts trading, settles all pending BTC exchange transactions, return all fiat deposits, and then intentionally never returns any BTC, does one have any recourse? I guess it would be some matter of Japanese law, international law (for claimants outside Japan), and the MtGox terms of service? What if these were virtual pets that people had traded?