I haven't seen this posted elsewhere, so lock this up if it's already been done..
(I think everything starts at 26:30)
Relic posted this video earlier today showcasing the 'missing' elite units that won't be in BETA.
So we have Stormboyz (yes it's a squad), the "Da Kommando", Gork, which really stuck out for me..
A notable addition is that one of the doctrines I saw..
"Terminator's Command - Focused Shot"
"Devastators fire a focused lascanon shot at the target vehicle. Causes Silence, Slow, and Disables Attacks."
Also check out some of those additional skins!