Appearing in 1st story
- Cyclops (Scott Summers) (Mentioned) (Dream)
- "Dumbo" (Sinister's mutant test subject) (Only appearance; dies)
- X-Haven refugees
- Cyclops Clone (Scott Summers) (First appearance)
Races and Species:
- Hell (Mentioned)
Synopsis for 1st story
- Synopsis not yet written
• The clock is winding down for mutantkind and one of the X-Men’s oldest foes has come to speed up the process: MISTER SINISTER has returned! And he’s bringing the X-Men face-to-face with their greatest fear...
• As the first chapter of EXTRAORDINARY X-MEN races to its exciting conclusion, one thing’s for sure for this team of all-new, all-different X-Men: Not everyone will emerge unscathed.