ok, few minor flaws here. The Helmet of the space marines are a bit iffy, prob too small and flat, the Chainsword is backwards (the main killing parts are the 'teeth' and....the bolters looks like some shotgun varient, sorry. but apart from those, awesome details and atmosphere.
I'm too much of a space marine fan/perfectionist to really like this pic. The helmet design is too compressed, the orks look too much like pigs, the dreadnought isnt that short while its gun barrels are too long, almost every black templar carries a chain sword, which as someone else already said was backward plus theres no chain to make it a chain sword, and the bolters dont look like bolters, they look like shot guns. I'm ocd about this sorta stuff. sorry.