That is a cute idea, I’m trying to accept it, but the Six in the picture (she’s in there twice) is the red dress Six which I think is head-Six. If it were physical Caprica-Six, it would make more sense for her to have head Baltar.

And the Baltar in the picture is clean shaven, but he’s in the outfit of prophet-Baltar, and we’ve never seen head-Baltar dress in this manner.

However, if we see Head Baltar appear dressed as prophet Baltar, that could add a lot of weight to this thought.