The Game Boy Rockman games return to the Nintendo 3DS eShop, with Japan receiving Rockman World 2 next week for 400 Yen. This hopefully means World 3, World 4 and World 5 aren't too far off. Hopefully they'll be coming sooner than later.
Do not forget: Brett Elston already confirmed a number of Game Boy titles for the West. Still no word on a release schedule, but we'll be keeping an ear out.