It will one of each system.
Coaxial: Either Boeing-Sikorsky or AVX.
Tiltrotor: Either Bell or Karem.
It will be good if award would allow the combination of the features to be employed, eg, Bell non-tilting engine with Karem's variable speed, or AVX's configuration with Boeing-Sikorsky's rigid rotors. But, from the article, it seems this approach is not on the cards.