| Issue | #263 |
| Published | January 1986 |
| Frequency | monthly |
| Cover Price | 0.65 USD; 0.75 CAD; 0.30 GBP |
| Pages | 36 |
| Editing | Howard Mackie (Assistant Editor); Mark Gruenwald (Editor); Jim Shooter (Editor-in-Chief) |
| Characters | Avengers [Black Knight [Dane Whitman]; Captain America [Steve Rogers]; Captain Marvel [Monica Rambeau]; Hercules; Namor the Sub-Mariner]; Jean Grey (within the cocoon) |
| Genre | superhero |
| Pencils | John Buscema (signed) |
| Inks | Tom Palmer (signed) |
| Colors | Christie Scheele? |
| Reprinted | In Essential X-Factor (Marvel, 2005 series) #1 |
| Characters | Avengers [Black Knight [Dane Whitman]; Captain America [Steve Rogers]; Captain Marvel [Monica Rambeau]; Hercules; Namor the Sub-Mariner; the Wasp [Janet Van Dyne]]; The Enclave [Morlak; Shinski; Zota]; Derek Freeman; Her (flashback); Jean Grey; Melter; Raymond Sikorski; Scourge; Adam Warlock (flashback); Nelson (FBI diver); Carter (FBI diver); Keegan (Melter's henchman) |
| Synopsis | Sub-Mariner joins the Avengers. The Avengers retrieve a cocoon from the bottom of Jamaica Bay which contains the dormant body of the long-thought-dead Jean Grey of X-Men fame. |
| Genre | superhero |
| Script | Roger Stern |
| Pencils | John Buscema (breakdowns) |
| Inks | Tom Palmer (finishes) |
| Colors | Christie Scheele |
| Letters | Jim Novak |
| Notes | Continued in Fantastic Four #286, which leads up to X-Factor #1. |
| Reprinted | In Essential X-Factor (Marvel, 2005 series) #1 |
| Script | various |
| Letters | typeset |
| Notes | Letters on The Avengers #256; Question of the Month "Does anyone in your family look at your work? Who?" asked to Stern, Buscema, Palmer, Novak, Scheele, Mackie, Gruenwald and Shooter; Special Announcements Section. |