The Peabody as Warden Theory is dependent upon the motive to kill LaFortier in that he was in fact an hidden absentee Warden, Peabody had been waiting for years to identify the Warden, and had him killed releasing Demonreach. This is the reason I believe why Jim in WOJ will not disclose the identity of the Warden before Harry, it gives away Peabody’s motivation.
His intention was to slip to the island when he wouldn’t be missed and undergo the ritual (he is an expert on summoning and binding due his previous work on the Erl King) but Harry beat him to the punch, something he couldn’t know until he himself was on the island tried the ritual and failed. He was one of two people to arrive on the island from the Never Never with the Winter Spiders, likely this was from a back door normally protected by Mab, and used by the Gatekeeper, so Maeve would have accompanied him. There is a link from Pell’s Theatre in Chicago to just outside Arctis Tor, so Peabody could set off after the rest of White Council and arrive at the island about the same time, and leave and get back to Edinburgh by the same route.
It’s likely this which turned Mab to the need to kill Maeve.
I do genuinely thank you for your earlier post, it led me to an insight as to why Demonreach was so important and fits with several other theories I have put forward about Cowl and the Red Court. It was a piece I was missing, but is obvious in retrospect Demonreach was to be a sword of Damocles over the Red Court, Cowl never intended to be dependent upon their good will.
The WOJ about the Red Courts origins is from a Q&A a few years ago, I would have to review several YouTube videos to identify which. It is certainly pre- Skin Game and as he had killed them all off probably after Changes. However it is consistent with parts of the text and WOJ about the Greco Romano Gods and the anticipated wrestling book in relation to what happened to the old pantheons. The WOJ was I believe in respect of this passage, and the questioner wanting more information.
“He shook his head. “What you must understand is that you face beings such as I in this battle.” I frowned. “You mean . . . gods?” “Mostly retired gods, at any rate,” Vadderung said. “Once, entire civilizations bowed to them. Now they are venerated by only a handful, the power of their blood spread out among thousands of offspring. But in the Lords of Outer Night, even the remnants of that power are more than you can face as you are.” Page 162 of Changes.
Odin at this time is a shadow of god-like self himself, and being coy about his current power level, to avoid giving information away, inadvertently about himself, we only later discover he became mortal to stay in the mortal world, suggesting the Red King is in a similar situation, no longer wielding anywhere the full power of a god. We don’t know he is also Kringle at this time (although Jim put in an Easter Egg) the Red King may have been the de powered remnant of a depopulated pantheon, accepting mortality over exile or imprisonment