Ok, so according to this and J.J. Abrams, Michael Vartan WILL reappear in the season later.
Interesting... (Be carefull. Some of this reveals a little about the future!)
Alias (ABC): Holy cliffhanger! The shocking twist at the end of Alias' season finale, in which Vaughn (Michael Vartan) reveals to Sydney (Jennifer Garner) that he's not Vaughn and the newly engaged couple's car is struck head-on by an SUV, had to be the most jaw-dropping, eye-popping moment of the season.
Still, it's not Vaughn I'm worried about. Despite Teddy C.'s predictions that he would leave Alias this season, I have it on the highest authority that Michael Vartan will be back as a series regular when Alias returns for its fifth season. (Please join me in a celebratory Snoopy dance.)
The concern is when we'll see Michael--or anyone on Alias, for that matter. I'm told ABC suits didn't know of Jennifer Garner's pregnancy when they decided to renew the show (given the surprising early pickup, she probably didn't even know herself), and now the higher-ups are in something of a pickle trying to figure out when the show can return.
Sadly, according to a source close to the show, it's becoming unlikely that Alias will return in the fall as planned, instead coming back at a later date. Though waiting a few extra months (or, shudder, possibly longer) to find out Vaughn's bloody secret might send us all to early graves, here's hoping there might be an upside: that ABC takes the time to find a better time than that kiss-of-death slot on Thursday nights...please?
09/22 - "Alias is, perhaps typically, a puzzle this year," Abrams said. "The Vaughn storyline is not what it seems, but that's all I can say, or the writers will kill me. They know where I live." In their promotional material, ABC insists that Vaughn does survive the crash, but my advice to you is this: Forget everything you've heard from everywhere (including moi) and just watch the first few episodes. I know patience isn't exactly a tuberly virtue, but in this case, it's worth it. [Amy Acker] told me she's starring in at least three episodes and said, "I hope there will be more!" She also revealed that although she has met Jennifer Garner, "who was so lovely," most of her scenes have been with Rachel. "I don't know what's gonna happen, but what we did so far, we're friends who work at this agency together. I think the Shed is what they were [calling it]. She's a rookie agent, and I have a little more experience than her, but we're best friends."