[KMS] Cryptic commercial suggests something possibly major on Feb. 26

Actually, and Elder Balrog with high knowledge in magic wouldn't surprise me. Ever notice how Jr Balrog (when summoned) has a star-symbol? Also notice how when a Crimson Balrog dies, there's a black star-symbol around it as well? Probably some sort of alchemy or magic.

-thinking too hard into it- Damn my FMA craze..

Those are both symbols used to control demons. In actuality, the way such a symbol works is that you stand in the center of it and it protects you from being harmed by it (maybe this is why the symbol appears directly over you when you summon a Jr. Balrog). But yeah, it's also an alchemical symbol (the opposing triangles in this case represent opposite elements, like Fire and Water) so this is certainly something to consider. If you also look at the Tolkien original balrogs, their leader was Gothmog, who is powerful and has huge forces at his disposal. Still, he's directly controlled by the real villain. If this is a balrog, I don't think it's unreasonable to assume that while it may be strong and intelligent, it is still under the influence of someone else.
(point is it's worth bringing up. :p)