I am pretty sure the answer is already no, but my friends and I have noticed a spike in the amount of newer players on the 360 version of Halo Wars (mostly high ranking noobs). This got me curious, since I recently read a post on a youtube vid saying the 360 version players could play with Xbox One version players. I didn’t believe it, but wanted to confirm.
If this is true, then I may not be as mad at them for splitting the MP community of the Steam and Windows Store versions (still a little mad though).