MARVEL COMICS SOLICITATIONS FOR PRODUCT SHIPPING SEPTEMBER, 2005 Some of the item's shipping in September include: View:"Spider-Man: House of M" #4, Cover "Ultimate Fantastic Four" # 23, Cover "Ultimates 2" #8, Cover "Ultimate X-Men" #63, Cover "The Sentry" #1, Cover "New Avengers" #11, Cover "Official Handbook of the Marvel Universe: Alternate Universes 2005", Cover "X-Men: Colossus - Bloodline" #1, Cover "Cable/Deadpool" #20, CoverSource: Comic Book Resources
Maybe Whedon and co. are taking a brief hiatus from the series before returning with a new arc in issue 13? Remember, he was only slated to do 12 issues, but signed on for another 12 when offered. I wouldn't be surprised if he needed a little extra time to work out the second arc.
It was always a 5 issue mini series, at least according to the writer in an interview with Wizard. But with it's seemingly bi-monthly status it should take about a year to finish off anyway.
Hmm okay on looking when did the Megamorphs thing get done in a comic, that's got me wanting to check it out. (still wishes he got that book where Aunt May pwns Wolverine)
Also, it's not a complete list of titles for the month and the book has slipped to bimonthly. Even if Whedon doesn't take a break between 12 and 13 there might not be an issue for Spetember.