Well poop…Unfortunately, the first wave of 104 games that will be backward compatible on November 12 for the XBOX One will not include Halo Wars or Halo Reach.
[UPDATE] Heh, looks like I completely missed the fact that both Halo Reach and Halo Wars will be out the following month. AWESOME! Thanks Laird for pointing that out to me.
For a complete list of the backwards compatible games coming to XBOX One on November 12, go HERE.