Might as well go all in, one company at a time.
Microsoft:
Halo 5: Massive Info dump, unquestioned star of the show. Yes, but will not be star of show
Rise of the Tomb Raider: Pushed to December to give Halo 5 some breathing room. Gameplay demos. Yes
Fable Legends: Out in early 2016, Info dump with gameplay. No, will be 2015
Gears of War Collection: Announcement with a November release date. Done to build hype for... No, will be Gears 1 not all 3
Gears of War 4: Announcement trailer. Maybe
Crackdown: More info, given a vague 2016 date. Yes
Phantom Dust: F2P, releases in September. No
Remasters of Metal Wolf Chaos and Shin Megami Tensei Nine. Announced in name only, stated to be worked on for late 2016 as a last ditch attempt to capture the Japanese market. This attempt is paired with... No chance
FF15: More gameplay/cutscene footage. Given a firm Spring 2016 release date. No chance, its Sony's
KH3: Date moved to 2017, will prepare a port of 1.5 HD + 2.5 HD in mid-2016 as a refresher course for MS fans. No chance, its Sony's
3rd Party Montage: Bits and pieces of what's shown at other conferences. Ubisoft has a go with AC and The Division + Rabbids. Yes
EA pops up with Battlefront and a tease for ME4 (Saying it premieres first on X1), No chance for Battlefront, its Sony's. And No chance ME4 is timed
Bethesda comes in with Fallout 4 and Doom No, they have their own conference for that
WB peeks their heads out for a last-ditch Arkham Knight promotion No chance, it's Sony's
Konami shows the MGS5 trailer they use for the entire conference. No chance, its Sony's
Indie reel: No real exclusives, just timed releases. Yes
Minecraft Telltale release date + Gameplay for January. Sure
Brief confirmation that Minecraft 2 is in development. No chance
CoD: BLOPS 3: Full Monty. Gameplay, DLC announcement, release date, what have you. Yes
New Destiny DLC announced. December release date. No chance, its Sony's
New Controler revision called "Ace". Better bumpers and triggers. Sure
New Console Bundles with Gears and Tomb Raider. Sure
Last announcement is a reveal of multiple projects from Rare underneath the banner: "The Ultimate Projects: Play the games" for maximum nostalgia. Battletoads XBLA in September, Conker's Big Reunion + Project Spark retail release in January, KI Season 3 in 2016 and the big clincher being Banjo-Threeie for release in Fall 2016. No, Rare isn't some megapowerhouse, at best they'll have one main game and 1 smaller downloadable game