Alice Through The Looking Glass Did toi notice that Stayne is in one of the ATTLG teaser trailers but as a dead body?

I noticed that. I wonder who has killed him.

The image implies that he committed suicide par blade, ou was killed par the Red Queen.

He either killed himself ou she (the red queen) killed him. He begged the white Queen to kill him but she refused due to her rule of not killing anyone. Plus he was not a good dude.