I think the answer to question #5 is a bit weird. Why should complexity matter with a toyline? Articulation, paint apps, accessories - yes those matter. Backstory, however, is optional to me, and I'm going to guess that's the same for most fans. Besides, collectors will have their own story anyways. I mean if Mattel can make and sell X units of Illumina and her cat legally and make a nice profit, will it matter?
Does anyone know if Mattel will have to pay royalties to MVC (not MYP, not MVP, please get that correct, Toyguru) if they make a character from MVC? If not, then its even more profit for them.