| Midnight Angel Armor (12 variants) | 22 |
| Midnight Angel Armor (4 variants) | 316 |
| Mind's Dilation (12 variants) | 277 |
| Mind's Dilation (4 variants) | 344 |
| Mind's Eye (12 variants) | 288 |
| Mind's Eye (4 variants) | 447 |
| Minion Missile (8 variants) | 663 |
| Minotaur, Roxxon CEO (12 variants) | 539 |
| Mirage Mirror (4 variants) | 443 |
| Mirage Mirror (12 variants) | 206 |
| Mist-Cloaked Herald (12 variants) | 760 |
| Mister Fantastic | 876 |
| Mister Fantastic (8 variants) | 2 |
| Mister Immortal (8 variants) | 727 |
| MJ, Rising Star (8 variants) | 773 |
| Mjölnir's Might (8 variants) | 697 |
| Mob Lookout (8 variants) | 821 |
| Mockingbird, Bobbi Morse (6 variants) | 842 |
| Mockingbird, Bobbi Morse (12 variants) | 522 |
| Molecule Man (4 variants) | 292 |
| Molecule Man (12 variants) | 9 |
| Molly Hayes, Runaway (8 variants) | 698 |
| Molten Lavamancer (8 variants) | 699 |
| Monologue Tax (12 variants) | 139 |
| Monologue Tax (4 variants) | 317 |
| Moon-Boy, Dino Rider (12 variants) | 563 |
| Mountain (6 variants) | 863 |
| Mountain (6 variants) | 864 |
| Mountain (6 variants) | 862 |
| Mountain (6 variants) | 859 |
| Mountain (6 variants) | 865 |
| Mountain (6 variants) | 861 |
| Mountain (6 variants) | 860 |
| Mountain (6 variants) | 858 |
| Ms. Marvel, Elastic Ally (8 variants) | 744 |
| Multiversal Recruitment (8 variants) | 629 |
| Mysterio's Mirage (8 variants) | 630 |
| Mystic Monastery (12 variants) | 253 |
| N'Yami-Class Mother Ship (4 variants) | 444 |
| N'Yami-Class Mother Ship (12 variants) | 110 |
| Nakia, Wakandan Operative (12 variants) | 69 |
| Nakia, Wakandan Operative (4 variants) | 384 |
| Namor, Atlantean King (12 variants) | 88 |
| Namor, Atlantean King (4 variants) | 409 |
| Namor, Scourge of the Seas (8 variants) | 631 |
| Namora, the Sea Queen (8 variants) | 632 |
| Nature's Lore (12 variants) | 177 |
| Negative Zone Portal (12 variants) | 111 |
| Negative Zone Portal (4 variants) | 445 |
| Nick Fury, Spymaster (8 variants) | 603 |