Single Player:
• 11 new levels
  
  Characters:
• Vulgars - The same as Imps only faster and they do a lot more wall crawling.
• Bruisers - Half mecahnical monsters with computer monitors for there mouth, they have a tendency to hide as wall monitors and then bust through the walls after you.
• The Forgotten - Same as the Lost Souls in Classic Doom
• Hell Hunters - Like Floating legless HellKnights, these monsters have the ability to warp time.
  
  New Weapons/Items:
• The Double Barrel Shotgun - Goes Boom.
• The Grabber - Gravity Gun.
• The Artifact - Allows the player to manipulate time by slowing the world down, also increases damage and makes you invincible.
• Environment suits - They will have flashlights mounted on them.
  
  New MultiPlayer Features:
• Four new MP maps - Two are in Hell, one in the ancient civilization, then another base type map. It was also mentioned that the Maps will be considerably larger than DOOM 3's.
• 8 Player limit