Ok so this makes more sense. If the implication is marvel is purposefully creating contracts with contradictory wording or open ended statements that then can allow them to basically use their legal team to make some one poor before they get a dime so they give up. Then ok, I get that and I see the problem. But if the implication is the contract says something like *the creator(s) will each receive...) Then that is something that should have been elaborated on with questions at the time of the contract before signing.
It's really hard to say without reading one of the contracts.