I started to play the new Dawn of War. Did not really had a lot of time to get my teeth into the game. Just had a skirmish games.
I just had a run with the Space Marines
However,… even the look and detail of the ordinary troops have been updated. Cosmetically the various Space marine chapters are starting to find their true identity.
Not all the chapters got their Primes and not all have Titans.
Some chapter unique weapons and war gear is available. Dark Angels got their Ravenwing now.
Only pity is that the Custodians is part of the UltraMarines and not an independent chapter.
There is also a mod available to add more features and extras to the game. From what I have seen you will have Orcs in Space marine armour.