Well Cedric has been retweeting tweets asking him about new reward tiers so I think we'll be getting those at the bare minimum. Outside of that a new video? Kickstarter page revamp? The use of the word umbrella indicates we should get multiple announcements today at least. Guessing they'll go with one more big update later today that houses multiple announcements designed to conincide with the fan-led initiative that's happening at the same time today.
Optimistically I'm hoping for a PS4 physical version or Shenmue 1 and 2 HD. Just something substantial to electrocute the campaign.