Arma 2 has a reputation for including everything, but there's one thing they've yet to add that's dear to my heart: the CZ 805 BREN. Until they do, I'll never consider the game complete. Call me a stickler, but Czech military history is really important, and unless they announce Arma 2: Army of the Czech Republic DLC in the next paragraph, I'm going to throw a strop. Preparing strop throwing equipment...
Arma 2: Army of the Czech Republic has been announced! How fortuitious. Stand down, chaps. I'm amazed they're still adding to the game, but here it is: a new DLC that models Bohemia's home country's military protectorate, dropping in various Czech tech, like the L-159 Alca, Pandur II, and Dingo vehicles, into two new summery terrains: Bystrica and Bukovina.
What will the Bohemians be doing in these backdrops? It's tied into the Armaverse, so following the Takistan missions in Operation Arrowhead, the Czech forces are deployed into the two regions, hunting down a vicious war-criminal, Colonel Miyovic. 15 missions augmented with the typical single mission and procedurally generated game modes will run you through some patriotic (if you're Czech) battles.
It's out towards the end of the year.