Cumberbatch is a great actor but in the trailers all he does is snarl in a black trenchcoat and blow stuff up. I doubt he'll compete with Winn, Dukat, Weyoun and Female Changeling in terms of great Trek villains.
The movies tend to be big, dumb, loud Hollywood blockbusters so lack the nuance I like in Trek. The best "villain" in the movie series is V'ger. An unknown, alien being that opens up philisophical questions. That we've de-evolved from that to fucking Eric "FIRE EVERYTHING!" Bana blowing planets up for no reason is a sad state of affairs.