Funny, I was going to attempt to make a list of every Mega Man game ever made (I once recently counted over 60). There are at least two versions of each of the Mega Man Battle Network games from 3 onward (though I'm guessing their maps aren't much different), plus there's some other card game (which probably doesn't need a map, maybe). I think there's a Game Gear and a Wonderswan version of Mega Man and Mega Man & Bass, respectively, and two weird Mega Man games for the PC. Also, some weird Japanese story game for the PSX called Super Adventure Rock Man, I think, but that doesn't need maps. I recognize that you omit 3D and current-gen games, and I'm sure maps of certain games like Mega Man Soccer or the arcade games are essentially useless.
I'm playing ZX right now (well, it's on hold as I play Dragon Quest Heroes: Rocket Slime). Capcom also announced three different versions of Mega Man Star Force (known as Rebirth in Japan), a whole 'nother series, and so soon after ZX, sheesh.
I also find it funny that just last night I mentioned to Revned (who did a lot of the maps before being surpassed by Geminiman, whose name is the same as a Robot Master) that it's also funny that Pirate Man won our Robot Masters tournament yet he's the only one from the classic series whose stage isn't mapped yet (excluding the Mega Man 8 maps).
Also kind of funny is that I really really really like Toxic Seahorse's music for some weird hypnotic reason, and I don't remember much else about Mega Man X3...and yet that stage isn't done yet either but most of X3 is.
Funnily enough, I recently optimized every single .PNG image on the site, and the first maps were Mega Man III, the last maps were Mega Man X 3, unless you count the April Fool's maps, of which the last ones I compressed and the ones for this year were the Mega Man Solid X: Guns Of The Mavericks maps. Also, Revned's Mega Man III maps were the first Maps of the Month (May 2004), and Geminiman's and
Grizzly's work on Mega Man: The Wily Wars was the only time I got maps from the same game from different people on the same week, which led to the first collaboration here.
Funny.
Also, the two mappers whose names are the same as Robot Masters, Geminiman and TenguMan, are bosses that Mega Man has, in a sense, fought twice (excluding boss rematches). (Maybe the next mapper will be named Astro Man!) Okay, that's stretching the funniness of it all, so now I'm done.
The Mega Man Battle Network maps and Battle Network 2 maps on the site are some of the first maps I ever acquired, and the maps aren't organized or named properly. Plus, I never got far in any of the BN games myself (with the exception of Network Transmission on the GameCube), so that didn't help. They're well-done original maps, but it'd be nice to have properly named ripped maps. That might take a while though, but you'd think someone would do them, given the apparent popularity of them for there to be just about as many games in the series as other Mega Man series in only five years.
I also think it'll be cool to see all the 2D Mega Man maps done. At the moment, though, everyone seems to be working on finishing all the 2D Castlevania games. And it's funny...both Castlevania and Mega Man are by third-party developers (Konami and Capcom) and yet have had their original stars in Captain N: The Game Master! Boy, I just can't stop, apparently.