I really think it could be longer than expected before getting a full preview, maybe licensor approval's still pending or something or they had a lot of the figure ready before film's realease and are tweaking it now but were done enough to show what's in the teaser.
They made a teaser, the only piece in the TDK line they did that for, to me that suggests Two-Face will not follow the same reveal pattern as the other figures.
Wasn't there a teaser for V.1 Joker where we saw part of his face and a bunch of cards?