The Goliath and many other legacy models have been in the game for over a year and we have not seen any new commanders; so honestly I wouldn't get yer hopes up. Might be the "big announcement" after Brits hit the field, god only knows.
All those specific models are new, though. (The person that we know but i wont say because the name is blurred) knows whether or not things are there from vcoh or new super alpha stuff. Wouldnt just spawn in pictures of whatever while knowing new things exist in places they werent in before.
Not that it 100% means any of it will be put in the game. Relic will do whatever with them when the time is right.