I would compromise on not letting Antags on newer players but the rest of you are free game. I'm coming for you all. Know that when I ruin your games and blow your BP rolls, and one time rewards I'm in tears laughing. I actually see a few of my victims on these "Optional Antag Games" threads.

Evil laugher intensifies

I do see the various Faction Specific Raiders getting enclaves of the factions to join them to fight Shammesh. I suspect that there still is a Legacy Cache somewhere on the planet. Totally possible the Ancient Locals made a "time-capsule" of sorts before going through the portal and for a security precaution they set the Protectors' Medallions as the keys, hence why Shammesh wanted to get Ana's from Harec. Part of the campaign will be to use the factions to buy time to find the cashe and to steal back the other 2 medallions.