Megaman 7 getting the NES treatment was cool. I think doing 8 is unnecessary though, especially with all the dumb changes. So it makes me wonder what games should get a fan remake? Here are just a few that came to mind.
Megaman X7
Why has no one tried to correct this blunder yet? The story was pretty neat. Just keep things 2D gameplay wise and remake the stages a little. For Axl, you really just need to slap in something like X8's gameplay and you're good to go. If put into X4-6 or X1-3 style I'm sure it could be forged into a good game. You can even keep the soundtrack, since it was pretty damn good.
Rockman & Forte Wonderswan
An interesting premise, but looks and plays pretty bad. It could be a good game with some updates.
Megaman V
The game is awesome, but just think about having a more standard screen to character ratio, and with color.