For Nintendo, I have serious questions about how many first party games they can put out in a year. Because for 2015 (which is what this E3 is going to be about), as far as 3rd party support, they will get the 3 or more Lego games that come out, they will get the Skylanders and Infinity discs, they will probably get 2 or 3 movie licensed games, but apart from that, I don't think they get anything else on a disc. Can Nintendo put out 8-10 games in a year? I'm also wondering about the 3DS. What is left for them to put out? US third party stuff on the system is dead, and they already have put out Mario, Mario Kart, New Mario, and Zelda games for it. It's been close to 20 years since we have had a Nintendo-developed Star Fox- do they care to make a new one? We get release dates for a renamed X, (2014), Bayonetta 2 (2015), and Smash. We get a Zelda trailer with no hint as to it's release date, but it's hinted to be 2016. Sonic Rush cartoon is shown, and it makes everyone just want to die
Dark Horse prediction: We get first glimpse of the next handheld system
For Microsoft, there presser is going to be all about games. They are going to have the exclusives on Call of Duty, possibly Battlefield (although the rumor of Sony giving beta keys out at theaters makes me think otherwise), Metal Gear Phantom Pain and EA Sports. They are going to show you a bunch of games we don't know about- if you want to see the next-gen third party games, this is the conference for you. They are going to show you Halo 5, they are going to show you more of Quantom Break. We will see the next Mass Effect, and like the rumors say, it will have (timed) exclusivity. The only non-game stuff they are going to show you is probably going to be original content- we will see some of Halo TV, we will see a trailer for the ET documentary.
Dark Horse prediction: We see an old Rare property (Perfect Dark?) being made by a different studio. We get a 20 dollar Mic accessory that replaces the kinect and does all the voice commands
For EA, they are going to show off sports games, and probably have a live demo of NHL, their first foray into next-gen hockey. NBA Live is dead again. Amy Hening will come out and talk about her Star Wars game, but the only one they actually have to show is Battlefront, and it will be a trailer. Big blowout on the Sims 4, and we get a gameplay trailer of Mirror's Edge 2. Dragon's Age will be the thing everyone is talking about afterwards
Dark Horse: announcement that they have acquired the MLB licenses, and show a prototype for their next gen Baseball game
For Ubisoft, I have no fucking idea what they do. Far Cry 4 will be shown and demo'd, Aisha Taylor will once again wear a #girlwood shirt, and they show The Division again
Dark Horse: Beyond Good and Evil 2 still exists and is shown
For Sony, they are going to have a more reserved conference. They will have an Indy showcase on stage like last year with at least 1 or 2 crazy announcements (Mighty No 9? IGA teasing a game?), and they will have Assassin's Creed and Destiny, but the rest is a little hazy. We probably get some update on Everyone's Gone to the Rapture and Rime, and prehapes the first demo of The Witness. They will spend more time on PS3 than they should, and announce a semi-big game for the holiday that's exclusive to it and will make people bitch about it not being on PS4 (no clue what this is). There will be a PS Now demonstration, as well as a small set top box that comes with a controller for use with PS Now for under 100 dollars (A Vita TV with the Vita stuff stripped out and replaced with Android, essentially). But unless Sony has their third parties working overtime, I don't see what big PS4 exclusives they are going to have, but am willing to be surprised
Dark Horse: Voiced Persona 5 animated teaser, PS3 hardware revision that knocks the price to 179.99
Other tidbits from E3:
-Final Fantasy 15 gets a Q1 2016 US release Date
-Resident Evil 7 gets announced for all current gen hardware
-Less smartglass/second screen stuff than you would think
Those are my official E3 predictions, hit up your bookies now