>>Additionally, there's no upside for creditors if Bitcoin becomes $5,000.
It's funny you mention this, because from what I can understand of Japanese bankruptcy proceedings[1], any excess assets remaining after paying off creditors would probably be given to the MtGox shareholders, which primarily consists of Mark Karpeles[2] alone. I believe the term surfacing in other circles is "unjust enrichment"[3][4].
He showed up on Reddit saying he's finding ways to return the excess back to creditors in case price stays over 100% claims at the time of distribution.
https://www.reddit.com/user/MagicalTux/