Ars can confirm that at least one major developer is currently planning to release a new virtual reality game on the Xbox One in 2017 and plans to show that game at E3. The news lends credence to multiple recent reports suggesting Microsoft is planning a more powerful, VR-compatible Xbox One for 2017.
The information was provided to Ars directly by the developer as part of pre-E3 planning and was confirmed by a PR representative. Ars isn't at liberty to discuss the name of the game or the specific developer, but we can say that a well-known European studio is planning "a new VR game" set in the universe of an established, long-running franchise.
The game is also being planned for release on the PC and PS4, and while it seems likely the E3 demonstration will be on one of those platforms, the PR representative was clear that an Xbox One version was also being planned. The game's working title contains the word "VR," strongly suggesting this isn't merely a VR-compatible game that happens to have a more traditional Xbox One version.