293 - Mystique

292 - Mysterio

291 - Mutant Force

These guys have some of the most uninspired villain names ever, and not even in the "old school charming" kind of way.  From left to right, you've got Slither, Lifter, Peeper, Shocker, and Burner.

290 - Ms Marvel

The Ms Marvel in the Handbook was Sharon Ventura, but I went with Marvel's new Ms Marvel, Kamala Khan, instead.

289 - Morlocks

288 - Morgan Le Fay

287 - Morbius the Living Vampire

286 - Moon Knight

285 - Moondragon

284 - Molecule Man

283 - Mole Man

282 - Mojo

281 - Modred the Mystic

280 - Mockingbird

279 - Mr. Hyde

278 - Mr Fear

277 - Mr Fantastic

276 - Mirage

275 - Mesmero

274 - Merlin

273 - Mephisto

272 - Mentor

This character's main claim to fame is that he fathered Marvel's space Hitler.

271 - Mentallo

270 - Medusa

269 - Mayhem

268 - Maximus

267 - Master Panedmonium

266 - Master Order

265 - Mastermind

264 - Master

263 - Mass Master

As with the previous Power Pack members, I've gone with an incarnation I liked better than the one in the Handbook.  This is Jack Power with his Counterweight abilities.

If you followed all of that, you are a giant nerd too.

262 - Marvel Girl

261 - Marrina

260 - Mantis

259 - Man-Thing

Finger-painted on my tablet.

258 - Manslaughter

257 - Mandroids

256 - Mandrill

Between this guy's disturbing look (dude with a monkey head) and his disturbingly rapey superpowers (pheromones that allow him to control only women), even as a kid I found him to be one of the more off-putting members of the Marvel Universe.

255 - Mandarin

Back for another year.