Originally Posted by
Grimm911
Miles Morales Spider-Man #10
SPIDER-SEMIQUINCENTENNIAL OR BIG 250th ANNIVERSARY ISSUE? That's right, it's our 250th issue and it's Miles Morales' birthday! But YOU'RE getting all the gifts! A mystery dating back to Miles' first appearance? Answered! A terrifying villain destined to become one of Miles' greatest adversaries? Revealed! Special guests, like maybe Peter Parker: Spider-Man? YOU KNOW IT! All busting out of 25 pages by main series storytellers Saladin Ahmed and Javier Garrón, PLUS a bonus back-up by Ahmed and a special guest artist delving into the history of your new favorite character, STARLING! Your FOMO is well-founded! DON'T MISS IT!
What do you guys think the mystery their mentioning is?
Best bet is the whole Oz formula immortality thing but with the way its written it seems like it could be something else entirely that happened earlier in Miles' introduction, and so far I can't think of anything.