I know this was a request, but I think you should do more stuff like this, with fewer characters.
While your massive line-ups are very cool, and cinematic, using fewer characters would allow for much more dynamic and action filled images. Of course, I can see your reasoning not to... you might get flooded with requests for certain team ups and such.
On the other hand... you could make it into a kinda-side series. A lot of small-groups in fighting smaller battles in each picture, but all in the same enviroment. Like, the MASSIVE group split up to cover different angles in a larger battle.
Some sniping, others acting as heavy support, others flanking, or even sneaking behind lines.
Or it might not be a battle, instead a sort of expoloration/adventure scenario, with different groups acheiving different goals in different places.
I agree with you completely. Smaller scale images would definitely allow for more interesting, emotional and dynamic images. The bigger these lineups get, the more like school class photos the pictures seem to look.