Hmm that a regular terminator? All his friends are primaris marines. I mean, it's clearly indominus pattern.... a few details on him I don't recognise, but not enough to think its something beyond being a few artist liberties.
There is no current model that matches that Terminator. Love the thicker thigh plates hope this means with chaos having so many new terminator kits that we are getting some soonish what with the current policies regarding the content of artwork only displaying actual models now.