Yeah, I was thinking that as well. I wouldn't be surprised if he does turn out to be Necrom. This post from the ghouly news seems to imply that his role in the movie will be small, with his main role being in the actual show.

I also wouldn't be too surprised if his Eyecon turns out to be the second one in the Genesis set instead of a second one for Ghost like we've been assuming...though considering it has no way of interacting with the Driver...Premium Bandai set of Javelle and Renaissance Eyecons with their own electronics? Maybe they can only interact with the Megauruoda? I guess we'll see.