I"m currently half way through RRR and have taken some foreshadowing here on board. Thanks guys.
ALL SPOILERS AHEAD. YOU REALLY SHOULD NOT BE READING THIS THREAD IF YOU ARE A PLAYER ANYWAY!
I'm not running with Doom Crow's monster kingdom, the uniting of disparite monster races under the one banner didn't sit well with me and the PCs have been very diplomatic in all their encounters, but have adopted a lot of ideas from that thread (thanks to you guys too). I agreed that the human element in the enraging of the Owlbear seemed out of place so have gone with direct action by the Trolls and their halfling slaves (some of which ended up on the Troll's dinner plate when they had outlived their usefulness). I've had the Trolls intimidating and standing over the other monster NPCs that are allied to the new Kingdom. The PCs were pretty freaked out by the Unicorn is are on the look out for what may have done this. The Trolls will be the first direct strike by Nyrissa's minions (the Stag didn't appear to have any connection to her by the PCs).
I've been playing up the fey connection to the Stolen Lands. Old Beldame got the party tripping balls on Black Cap mushroom tea and incited the Carroll's Jabberwocky to them. The next morning they asked about the Jabberwocky, the Tane and learnt that the border between the First World and the Stolen Lands was particularly thin.
My other plot driving tool becomes from one of my players's characters, the summoner. He had a twin who was still born at birth. His parents where distraught and tried on bring his brother back to life by burying him in a Fey mound and reciting a ritual given to them by the local herbalist and midwife (a hag in disguise). The ritual didn't work but the surviving son always thought there was something missing, a presence just out of reach. He researched and trained for many years before he was finally able to manifest his long lost brother in physical form (a biped eidolon). His brother grew up in a wild, wicked and terrifying land were he is routined hunted and often captured and tortured to death, only to reform and rise again the next day to suffer the same fate. He is grateful to his brother for giving him some relief but is resentful when he has to return to "the other place". Since forming the kingdom the persecution and torment has gone up a notch and one particularly gruesome death (which supported one of the eidolon's evolutions but that's another story) came with a warning that if his brother really loved him, he would stop playing Kings in a land where he didn't belong and pack up and go home. The PCs are now freaking out.
The other place is the First World, I may even make it ThousandBreaths. I was also thinking of have the brother's soul trapped in a soul jar (similar to Vordakai's) sitting as a trophy in the House at the Edge of Time. How I resolve this when it is discovered I'm not sure....
I think I'll also knock off the bottle idea by making one of the yet unexplored Hexes in the south unusually barren with a pervading background aura of Transmutation magic. I might put the bottle in Irovetti's castle.