I'm of the belief that all the Citibank contract does is transfer the rights, but not the current valid contracts for licensing.
And remember, Marvel's spreadsheet has posted a massive loss for licensing!!
Anyway, the valid contracts, like for the movie(s) would have money going to Marvel, and it would no matter what. Until all of Marvel declares some form of bankruptcy (again), Marvel's acct's receivables would continue to function normally. The default of the Citibank loan(s) wouldn't be like the bankruptcy some folks are picturing.
It's the change in acct's payables that might dictate near term events...
In the event that Marvel does decide to declare bankruptcy, THEN that marker for the character rights comes in handy.