So this is the situation.
My players have had an unfortunate case of death in the Sightless Sphinx and now the Mask of the Forgotten Pharaoh is in the hands of the Forgotten Pharaoh and the ib and ka have been rejoined.
My players want to continue the campaign with new 12th level characters but I have a quandry. Everything in the campaign assumes that Hakotep rises as a result of the release of his ib when the Forgotten Pharaoh dies. That hasn't happened because the Forgotten Pharaoh is still alive, the ib and the ka have in fact rejoined.
Given that I don't want to go back to the Sightless Sphinx and I don't want to give my players an effective redo of the fight against the Forgotten Pharaoh I am turning to you guys to give out some advice.
For me this makes the FP the ultimate BBEG of the campaign. He/she will be the final fight of the campaign rather than Hakotep. But from a campaign perspective what happens next?
So with that in mind how should I proceed?