Here are 3 more games, that I've seen flyers for but have never heard if they are real.
Vs. Lionex, Vs. Madura no Tsubasa, Vs Raid on Bungeling Bay
The first 2 are Japanese releases and look cool. They have a Zelda/Metroid look to em. The last one is a Japanese/USA release, I believe. There is a US flyer that actually promotes the game. I know that John has done some research on ROBB, but I'm waiting to hear back. It looks cool. I hope it plays like Activisions old River Raid! We will see.
Arcadeflyers.com has the pics. Check em out!