So basically I should read any Marvel Legendary FAQs and assume they apply to Legendary Buffy (just remember that Big Bad = Mastermind, Potential Slayer = SHIELD, etc...). Is that the idea?
I think it's a safe bet as well. As I recall, Legendary: Big Trouble in Little China gave the Lords of Death the "Bribe" keyword without bothering to describe it anywhere. It's as good as an admission that the rules of the "mothership" all apply except where game-specific rules contradict.