Well, they can do Medieval, Rome or Shogun again. That'd satisfy us grouches and if there was a cheesy Hollywood movie set in the era CA wants to set the game in then they would have hit the jackpot.

If they refuse to do this, then the Russian Civil War might be pretty good. Think about it. A lot of swords involved, some shooting and a huge amount of raiding. It's perfect for the E:TW system. One military advisor called the Russian Civil War "an 18th-century affair" (or something along those lines...).

Relying on DLC's that do nothing for the campaign and screw the multi will be the end for CA.