Generally when you buy a license to make something like this, you probably have to agree to 1. marvel approval of the final production model, 2. an agreement not to replicate prior like productions unless specifically contracted / permitted to do so, and 3.marvel would probably space the licenses for a particular character across competing companies by a year or two.
As for not allowing a lics from a GR with a motorcycle again, that would pretty limit any company being interested in producing a GR at all if the bike was off the table. But again, marvel (others), use their common sense in doling out these licenses both from a timing perspective, protecting their character, and maintaining value to the licensee by spacing licenses, and not allowing too many like productions in too short a period of time.
