I’m guessing they will be Sony branded specialty’s controllers, like the ones you have suggested. I think at this point it’s safe to say this will get resolved at some point. This will just be a temporary solution. To be honest, I’m fine with playing the PS4 versions until it’s all worked out. I was looking to purchase a Series X because of the issues with the PS5, but now I’m pretty confident I can wait it out. We are seeing good progress!
i agree with you, i also have time to wait, as i have been a typical playstation gamer since the PS1, i always liked the brand and console more and more, so i don't change my console choice right away because of a simple hardware item like the XIM working with XBOX earlier.
I'm also totally fine with continuing to play the PS4 versions for now. I play mostly BOCW with my clan anyway.
But by November 2021 at the latest I need a working version of the XIM - because the new Call of Duty will only be released as a PS5 version.
Therefore I can wait for now, but of course I hope that there will be a solution for PS5 soon.