Anyway I can improve this photo?

[Jatayu]

http://steamcommunity.com/sharedfiles/filedetails/?id=171905256

[psi onix]

add some lighting to the characters to make them more interesting looking... especially that which will cast at least some kind of shadows on the ground so as to help visually place them within the environment. Otherwise they appear as if they are floating.

Maybe set a focal distance? I imagine for this scene you'd want it centered around the characters. Then perhaps you'd want to add a little aperture to blur the background a bit. Then you could add some Depth of Field as well which really helps make the models look 3D.

Other than that, i am not really familar with TF2 so i don't know what you could add to make it more exciting from a TF2 playing perspective.