That very well may be but that does not explain that promo I saw. And tell me, Why would Palmer mention the guy at the airport that knew about the nerve gas in his memoirs that wouldn't be made public for at least a year? I swear I think they showed that promo by mistake for I have not seen it since.
As for the promo you're talking about, it could mean that Palmer will perform in some flashback scenes. But it won't mean he faked his death.