So, they added Will after the Mind Flayer scene.
Can confirm, have never seen Will there, including that same night.I went the same night they filmed for this and I didn't notice that Will when I went through Stranger Things.
I saw the Will after the Mind Flayer scene last night but (as shown in this last video) it was essentially a moderator just wearing their hoodie and the Will mask from the first scene.
No prob, I see a potentially good series in the future.Thanks