Once again, I find it hard to believe Azure Striker Gunvolt (3DS) is not in anyone's radar around here... It might not be a retail release, but it certainly has the pedigree to be noteworthy, being developed by the team behind the Mega Man Zero and ZX series.
First trailer: https://www.youtube.com/watch?v=9Wm8-DsVqHE
Hidden Stage gameplay: https://www.youtube.com/watch?v=JWo3j5SeSIU
The game is still supposed to come this summer in Japan and North America. (no release date for Europe yet unfortunately)