That is true. We do not even have a chance to get Obelisk. Also, we already did the Strings + Slifer event.
If he is NPC only, why the heck does this site continue to keep listing him along with the other characters on the Home page? Please tell me that this is just another GameA screw-up and that Konami is not serious about having him as an unlockable character!
Realistically, "Yami Yugi" and "Yami Bakura" are completely inaccurate names, too, since they're the spirits that inhabit the Millennium Puzzle and Millennium Ring, respectively, and not actually alternate personalities of their hosts.
Your technically correct that Yami Yugi and Yami Bakura etc are weird for the reasons you point out but it also still makes sense because it is still the host body being used. I am not sure why you felt a need to question the other Yami, it is irrelevant to the fact that Yami Joey is not a character. This is complete bull shit nd should be deleted. There never was a Yami Joey.
I wouldn't hold out hope for the "Eyes of Blue" cards. Konami is yet to include a single Tuner in Duel Links, even though several, such as Dragon Buster Destruction Sword, Genex Ally Chemistrer and Jurrac Aeolo would have been more than warranted and acceptable here.
Konami getting desperate. I mean they added Espa Roba. I wouldn't put it past them to add yami Joey or Tristan might as well start adding the randoms that were walking around in the shows and call them random duelest that walked in the show. Give em an event and shitty card rewards. They do for all the new events anyways.