How hard can this be to understand? (Score 1)

Blizzard has trademarked "Diablo" (not "Diablo a caballo" or "Diablo andaba en los choclos", just "Diablo") as a movie title, and a game, so they have good grounds to sue New Line. And yes if you submit a common word (or alphabet letter) for a trademark and it gets approved like in Blizzard's case, you'll have a completely legit trademark (stupid sounding maybe, but legit). That's just fact.