Batman: Arkham Asylum and Marvel : Ultimate Alliance 2 release dates

Either Gamestop really likes placeholder dates or they know something we don't. On their website they have Batman: Arkham Asylum showing with a release date of August 25, and Marvel: Ultimate Alliance 2 with a release date of September 8. These haven't been confirmed that I'm aware of, and dates are always subject to change, however I think these are pretty good indicators of the general timefram for when we can expect these two games. Barring any major developmental setbacks. Batman: Arkham Asylum drops August 25 Marvel: Ultimate Alliance 2 drops September 8