Source: The Wrestling Observer Newsletter
As noted earlier this week, WWE is promoting the October 10th edition of WWE SmackDown as the 15th anniversary special. All of the regulars on the weekly SmackDown shows are expected to be a part of the broadcast, as well as John Cena and Triple H, both of whom are booked to appear.
As things stand now, there is no word regarding outsiders or stars from the past appearing on the show, however many expect that WWE will go all-out for the show, so the belief is that there will be some big names appearing.