This link has just about all the leaked info I think:
https://imgur.com/a/6SgC7Ji
Just had a quick re-read of the Awakened Wyldwoods warscroll. Interestingly, it specifically mentions creating a ring out of each of the citadel woods used to create the Wyldwood. I guess they mention "ring" over "circle" so as to allow someone using four or more trees to create a more oval shaped "ring" which is longer but with less width to allow Wyldwoods to fit into and around spaces that are less open to the standard, circular, 3-tree Wyldwood? Would be interesting to see the tactical uses for that.