I think so... I don't have much 3D (game) programming experience, so correct me if I'm wrong, but isn't the 3D battle AI much like 2D battle AI?

If you look at simple 2D games, like Age Of Empires or Cossacks (bad game, btw) they used large scale battles and the AI seemed quite realistic.
The Lord Of The Rings battle-creator (or how the thing was called) was indeed very cool, however it was a very new piece of software and I had never seen anything like it.