What do you think will happen with the E3 Gameplay Reveal? Personally, I think:

• We'll be taken through a mission with at least two enemy types, or one extended mission and a shorter mission with different enemies.
  
• We will be shown how different abilities work, targeting for abilities, and if everything just works in a twitch manner or if certain things allow autotargetting.
  
• We'll see space combat, and be instantly reminded of Halo: Reach.
  
• We'll see the primary hub area/Capital City/Hangar filled with people milling around and not doing much, while a few people run back and forth. There may even be the ability to show off your sweet spaceship on plinths or similar a-la APB.
  
• We will see matchmaking in action, and how the menus work, and why it's oh-so easy.
  
• We will see some normal guns, and one super-gun with a super-sweet power that we'll be moist for. (ie Remember when the Needler was a new thing?)
  
• Cody Miller will complain about it all