This,like so many of your works that you've given us a preview of,is a really cool idea. Great start to the project as well.
If you don't mind,I would suggest you change the position of the guys' head that is kneeling. Remove a bit of neck and place his noggin straight up with line of sight parallel with the ground. Most humans keep their heads level like this and it is a very very common mistake with modelers to go with the bent neck thing when they modify a pose.
If Romain is looking(he never sleeps) he may chime in.
Always try to put your own body in the pose you are trying to portray to see if it"works" or even better,take a quick pic of some one else in that pose to use as a ref.
I know I know,talk is cheap.
J