Those who will be attending the event should expect the following to appear at the company’s booth:
Assassin’s Creed 4: Black Flag
Rayman Legends
South Park: The Stick of Truth
Splinter Cell: Blacklist
Watch Dogs
Ubisoft did also say that there will be "more" titles at the event, so stay tuned for that in a couple of weeks. I expect a new IP for next gen consoles. Here’s a link to the press release so you can read it yourself.