Microsoft's mysterious exclusive, ReCore, comes out September 13 on Xbox One and Windows 10 PC. The has its own stylish trailer that was showcased during E3:
While the trailer is beautiful and stylish it is more of a presentation trailer than a gameplay trailer. You don't really get much info about the gameplay from it. ReCore is considered to be a platform action-adventure game in terms of the genre. It is developed by two studios, Comcept and Armature Studio.
Here's a more detailed look at the gameplay: