Age of Empires II HD eventually became a really well done, definitive release. Hope they carry the lessons learned there over to this.
"Portions" of the game are owned by Microsoft so there are still some residual issues to sort out. Although Wikipedia says it uses a proprietary engine, I've theorised that BHG used AoE's as a base.
That ultimately depends on what the portions actually are. If they're related to the engine as I suspect then a remake would be possible without needing to reach an agreement with Microsoft.
There are actually two RoN Gold apps in the registry: 13900 and 33000. My guess is that one listing is Microsoft's and the other BHG's.