This is a neat twist. Certainly something good here for my game. I have a paladin of Iomedae, a druid, a cleric of Pharasma, and a ranger of Gorum.
I know, we have silly amount of divine power, but all this talk of Narrisa trying to siphon off Erastil's power and the PC's being sent via their god to stop it has got me thinking too.
Iomedae and Erastil both being LG would make sense for Iomedae helping her fellow aligned god.
Why would Pharasma care though? Is Big N succeeds and brings the whole of the stolen lands into the First World, does that mean all the mortals that were in the SLs be effectively immortal now? That could piss her off enough with breaking the cycle of life and all.
Not quite undeath, but living forever seems close as far as rebirth goes.