Those chapters don't follow their smurfitual liege, so don't expect much from them in terms of merch.
Blood Angels and Blood Ravens have been featured pretty extensively in games before and the new Space Hulk features Dark Angels. Since Ultramarines contribute to the Deathwatch, a game that features them would most likely have at least one Ultramarine.
I just wish there were more WH40K games featuring the Necrons.
I say make Space Marine 2, make it about a Deathwatch kill team with Marines from a diverse set of chapters (I say Titus, plus a Space Wolf, Dark Angel, Storm Warden and Black Templar) and have them fight Necrons. And maybe Tau, but have them have to fight along side the Tau to deal with the Necrons.