The PCs will eventually hunt down all of the demons they set free on Oerth when they were dead, without memories of their former lives, and had been led to believe that they were demons themselves working directly for Orcus. (It was a quick rescue-the-campaign idea after a TPK in an adventure where all of the souls of the recent dead were being sucked into the Abyss.) They'll continue to escape from the various minions Orcus has set after them (having regained their memories and escaped back to Oerth, where they found their original bodies - well, pieces of them, anyway - and had themselves resurrected, they're "the ones that got away," and Orcus is not pleased). I imagine it will eventually finish up back on the Abyss, with a showdown against Orcus himself, if they can get away with it (which will probably end with another TPK, but at least they'll go down in a blaze of glory); failing that, they might at least be able to rescue their NPC companion who didn't make the escape with them, and is right now the main baddie sending demons after the PCs at Orcus' bidding. It would be nice if they could get her back to life, with her memories restored.
Johnathan
Johnathan