There have been tons of rumors that a photo showing the hitchhiking ghosts added to your doom buggy is to be added.
We were told by Memento Mori CM's last Christmas that they keep hearing something like that is in the works. Maybe they were just saying that to encourage us to rebook trips regularly? Whatever the reason, that there eventually may be a photo from that point would be the most likely occurrence, I'd think.
As complex as HM is reported to be behind the scenes, it would possibly require a massive renovation to incorporate much equipment. Disney techs regularly work marvels, though, so who knows? I certainly don't but really REALLY hope at least a photo will eventually be available.
Memory Maker is fabulous, we think, but then we're lazy and don't want to mess with taking photos when the PhotoPass photographers do that better anyway.
One more benefit of MM is Magic Shots. Ask a PP photographer which they can do, and they usually offer a choice of two or three although not all can do these. They're great fun! Things like Olaf dancing beside you, Stitch popping up out of the pavement at your feet, or Tink poised on your open palm.
One of my favorites was the one we got in front of the big GF lobby Christmas tree. The photographer told DH to pinch his thumb and index finger overhead as if holding a ribbon as we kissed. The "magic" added a bundle of mistletoe bound by a pretty ribbon. A very Merry Disney photo!