Really, Blue Mage was the more far fetched theory.
The idea behind that class is willful learning of techniques from a variety of enemies - if we're gonna pick a superhero that fits that bill, Rogue is a less far fetched hint. Spider-Man was bitten once, by accident, and never sought out abilities from other creatures.
Compare that to a specific mention of a name, that when written in Japanese?
Samurai - サムライ
Sam Raimi - サム・ライミ
At BEST, that gives them equal weight as theories, but if we're really saying one is more far fetched...sorry, it was Blue Mage.