PCGAMER (UK) said there will be an add-on about the second quater.
Ensemble I believe are contracted to microsoft for 4 Age products.
Why would it be called: Or AoK:White and Red rose war?
Reasons why it would not be called this:
1) It is AOE not AOK, AOK is the name of AOE2
2) The war of the roses where just in England
3) The title won't end with a question mark