The creature that threw the high school sigh could be Peter. He slashed Jenifer's throat out almost right on top of them Nemeton which could have connected him to it. He started getting unusually strong afterwards too. Eichen house then stuck Peter in with Valack, who possibly put him back in a coma. If Peter is connected to the Nemeton he could draw power from it which could speed up the time it takes for him to wake up from the coma, and like last time his mind might not be quite right yet.
Entirely possible. I have Peter listed as one of my suspects in this very long and slightly rambly post. I’m sure Peter will resurface and probably still has a role to play. I just feel like he’s too obvious of a choice... But then again I’m looking for conspiracies at every corner, and might be over-complicating things :)