While neither game has been officially announced to the best of our knowledge, both Raystorm HD and Thexder NEO have recently been fully described by the Entertainment Software Ratings Board. So you can expect their respective North American announcements soon.
Both Thexder NEO and Raystorm HD appear to be remakes of the 8-bit and 32-bit originals. The former is listed as a Taito title, the latter from Square Enix, which owns the former. Hey, this is just how Square Enix prefers to do things, OK?
The ESRB describes Raystorm HD as: "Players control a futuristic aircraft that destroys enemies and targets in this vertical-scrolling shooter game. Presented from a third-person perspective, the game allows players to fire lasers and missiles at asteroids, ships, planes, tanks, and buildings on the ground. Players face a steady swarm of enemies and bosses that react to damage by exploding in fiery bursts and plumes of gray smoke."
Its description of Thexder NEO is: This is a side-scrolling action game in which players control a transforming robot through a series of maze-like levels. Players must destroy enemy robots along the way by shooting them with laser beams. Most enemies react to damage by disappearing in a colorful burst; boss battles depict more protracted combat with louder and more realistic explosions."
The above screen shot of the Raystorm remake, listed as an Xbox 360 and PlayStation 3 title, comes from a post on NeoGAF from earlier this month. I don't know how much more confirmation you'll need that these two titles exist.