Quite a few SW and Tyranid models were released, some much needed (TWC and Lords as well as the big Bugs). Its widely anticipated that the summer will be the release of 6th edition, which is supposed to include Dark Angels vs Chaos Marines (confimed to me by GW staffers but take that as how you wish).

That means 2 new codices as both need makeovers pretty bad, probably new units if Necrons/Gk/DE are the model for comparison, and then Necron 2nd wave at some point if they want to keep all the Necron players they just picked up happy.

Sounds like a pretty good 40k year to me.