I imagine that some of the turned will be more or less be ordinary humans that have turned into zombies. In more dangerous areas that they’ve been in longer they may be more mutated. They may have eventually formed hives with “wall mounted grapplers,” spawners, and other growths. In their own dimension, and places where they’ve crossed directly into the main dimension of the game, (these places could be where the infection first crossed over, or maybe more turned are still coming across to new locations,) I’d expect to see some completely alien and inhuman forms of the turned.
Like Harvest said I’m expecting both fairly regular zombies and more mutated things.
These Turned are coming from an alternative dimension similar to the Upside Down from Stranger Things, so I think it is more than safe to say we’ll see some wacky shit. I’m definitely all in for this.