Before anyone else does so, allow ME to give MY infinite wisdom on this matter!!
To be honest, I think it will probably be a promotional appearance, as it does state in the article that it's not confirmed if he'll wrestle. HHH isn't meant to be back until November, so In my opinion he'll be back for Survivor series. Bottom line, he will be back in the ring as he definitely has a few more years left in the tank, and it would be stupid not to put him back in as he's one of the more popular wrestlers. Hope he turns heel after he settles his score with Sheamus too.
Now THAT, is infinite wisdom!!