Is it just you or did the others show up withWelcome back It's like everyone says, the Seal, no way back, huge conflicts, etc. Lucifer was the big bad but we stopped him and prevented the Apocalypse. He's locked up in Hell's Cage. But now some angels are planning to restart the Apocalypse, if they can.
There's a post here where Faith explains it too, and the link in that post is also helpful.
You were here a couple times before, but.. I'd guess you don't remember that. It happens sometimes with some of us, we don't always remember previous visits.