Greg Grumbergs pilot was not picked up, so he will still be on Alias.
From what I've read at spoiler sites, vaughn will definitely be back next season, he is not dead.
ABC is somewhat upset with Jennifer Garner being pregnant, since it makes it harder to film the show. Will might be coming back for a couple episodes, but nothing is definite yet.
Also the show might get pushed back to a January debut, just like last seasons.
