I think Sega is waiting until all 4 "3D" titles are released in Japan, and then we'll get a collection of all 4 games for one price here in the states. That way it will be a better deal, and more consumers may buy it. At least this is my thought on it. I would buy Space Harrier no problem, but I really don't want Hang-On.
About time MM4 came out. At this rate we'll get 5 in June and 6 in December.
There was a release some where MM5 will be next month and MM6 is June. I believe 5 actually is dated too.
To be specific, Mega Man 5 will arrive on the 16th of May. No announcement of Mega Man 6's release date yet. --- Not changing sig until Toad, Jill and Drill Dozer are playable characters in the new Smash Bros.