W&F, a WWI mod would be splendid. I have personally not seen that many WWI games so a WWI mod, if done well, would be very good I think.

I say, if you think you can do it, perhaps make a mod team and such, then reach for it. If things seem impossible, then make them possible. Improvise, compromise, be creative, mask things and alter them, conceal errors and make things appear how you imagine them: it is the way of the artist, of the creator.

I am no modder, but I have been a creator of things with an artistic mind: the principle is the same in many cases.