Re: AVENGERS: Grade, Reviews, Discuss, DVD & Sequel **SPOILERS**
Storm's only been in the Fantastic 4 other than iterations of the X-Men AFAIK.
There are other iterations where she's an Avenger. Practically every hero in the Marvel Comics Universe has been an avenger at one point or another. Spider-Man has been an Avenger.
-Godzilla, King Of The Monsters