CoDBO2 DLC:s (Zombies)

When i saw at Martlon was not in Die Rise Trailer (Anyone thinks at he is Zombie i think so too.) I thought who will take place of Martlon? And when the Orginal Characters (Tank Dempsey, Nikolai Belinski, Takeo Masaki and Edward Richtofen (Samatha Maxis) Will figth the Zombies Then i got A Theory Maybe One of the Orginal Character will take place of Martlon. And Other DLC:s will do the same thing (DLC 2, DLC 3 and Maybe DLC 4 Edward maybe will not come and Samuel will stay he is The Key to hear Richtofen)