Downton Abbey: The Grand Finale's Trailers Are Hiding One Major Character - Why?

Both Downton Abbey: The Grand Finale's teaser trailer and its archetypal authoritative full-length trailer are hiding 1 of the franchise's astir important characters, but why? Downton Abbey: The Grand Finale is slated to beryllium the last Downton Abbey story (although creator Julian Fellowes hasn't wholly ruled retired a instrumentality to Downton successful the future), and is truthful expected to bring each the characters' large storylines to a close.