Marvel
| Name | Super Name | Code | Actions |
|---|---|---|---|
| Jackpot | Jackpot | Jackpot | Show |
| Jack O'Lantern | Jack O'Lantern | Jack-O… | Show |
| Jack of Hearts | Jack of Hearts | Jack-o… | Show |
| Jackhammer | Jackhammer | Jackha… | Show |
| Jack Frost | Jack Frost | Jack-F… | Show |
| Jack Flag | Jack Flag | Jack-F… | Show |
| Jackal | Jackal | Jackal | Show |
| J2 | J2 | J2 | Show |
| It! The Living Colossus | It! The Living Colossus | It-The… | Show |
| Isolationist | Isolationist | Isolat… | Show |
| Isbisa | Isbisa | Isbisa | Show |
| Isaiah Bradley | Isaiah Bradley | Isaiah… | Show |
| ISAAC | ISAAC | ISAAC | Show |
| Iron Patriot | Iron Patriot | Iron-P… | Show |
| Iron Monger | Iron Monger | Iron-M… | Show |
| Iron Man 2020 | Iron Man 2020 | Iron-M… | Show |
| Iron Man | Iron Man | Iron-M… | Show |
| Iron Lad | Iron Lad | Iron-L… | Show |
| Iron Fist | Iron Fist | Iron-F… | Show |
| Iron Cross | Iron Cross | Iron-C… | Show |