The below video shows a short but sweet clip of the new Doom in action and the newest version of the Revenant. Here's a look at how it's evolved through the series. Above is the original model for when it first starred in Doom 2.
A Tweet from Doom creator John Romero revealed the original direct from video scan image above.
Doom 3s Revenant isnt far off our new version. Oh the screams...
And then we have Brutal Dooms version. See the below video for the true fatality-shaped joys on offer.