Microsoft has never been king of the market. They only served to gain half of the numbers of Sony's marketshare previously. They just exposed Sony's weaknesses last gen which caused them to be in second until Sony caught up to them again. If they were truly that dominant Sony would never have caught up. This is exactly the reason why Sony doesnt need a year head start(like Microsoft) to  beat Microsoft to beat their main competition. They beat Microsoft head to head based on one month of separation. When its head to head Sony more often than not will be chosen compared.

Sony should not fear the Microsoft of yesteryear. When it comes to the hearts and minds of actual gamers who watch E3, they should worry about Phil Spencer. A guy who is actually bringing the value of games back into the forefront for MS since Shane Kim.

The domiated nothing. The Playstation and the Xbox were dominated by the hype known as the Nintendo Wii.

Doubtful, that will probably be an NX game.

Yeah, but it sucks that one individual opinion sways E3. I've seen Nintendo win E3 before and those tend to be Nintendo's best years for gamers. Sony has the sales, but as far as games are concerned I cannot say whether I believe they deserve it even as a PS4 and Xbox One owner. I can definitely see that better days are coming as I know Sony are late bloomers. That whole "Greatness Awaits" thing is so true with them, because we're always left waiting. Microsoft always bursts out the gate with third party exclusives. Look at the Xbox, 360 and now the One. Microsoft is investing in new IP's but the new ones I hope survive this war and give birth to sequels are Quantum Break and Scalebound. I believe with all of my heart that Gears 4 will have a CG trailer at the next E3 so a lot is riding on what happens here. E3 can affect the holiday expectations of sales within certain brands. Fourth quarter matters a lot though and thats where Microsoft tends to win. I fear less for Microsoft on fourth quarter. I am playing my Xbox One right now much more than my PS4. Hands down MS has come to the show ready to fight. The question is will Sony live up to their great name and show some fight? Right now they are missing punches while Microsoft is throwing all of the landing blows. Nintendo is just fighting to get noticed.

Of course, but with Sonys performance they are surviving off of name value right now. 2016 is looking brighter as Uncharted looks to wave the Sony banner into a better year, but Microsoft is coming back harder than ever and will be throwing a bunch of games at Sony and to tell you the truth, Nintendo has won E3 before in my eyes and they can do it again. Microsoft, I expect some good reveals while Phil Spencer is the head. This should be an exciting E3. 

Sony will have content with :

Possible Official PSNow launch for certain territories
Morpheus games
Possible GT7
GG IP
MM IP
Sony Bend IP
Ratchet game

With the number of studios, number of old and possibilities of new IPs, I don't think Sony should have an issue. Worse comes to worse they can moneyhat a third party for an exclusive.

We still may get release dates for:

Deep Down
Dragons Dogma Online
New Yakuza games coming to the west
Uncharted trilogy remaster
The witness release date
No Man's Sky release date

Among the games you mentioned, the two I believe will launch this year are Halo 5 and Forza 6.    The lack of news about TB and QB make think they are 2016 games.

I think MS  will repeat last holiday strategy of crazy bundles, but this time without price drop.   I don't believe there is room for a new cut in price this year.

Zelda U and Star Fox trailers with few announced games for this year are more than enough (especially big Zelda U trailer).
And they certainly have something new to show for Wii U.

You are in a such minority..

Sony and Nintendo don't have anything to worry about, they have a larger number of exclusives this year than Microsoft.

Sony has yet to announce a release date for Ratchet & Clank, I think it will be a big deal for them in the Fall and the game has a movie release, going into theaters, which Sony will no doubt push hard, that could make for a great fun platform adventure, with shooter mechanics and puzzles.

Guerrilla Games has released a new exclusive every 2 years since KZ2 came out, it seems likely they'll have something for the Holidays this year since Shadow Fall released in 2013. Maybe it's their new IP, maybe Cambridge has a new Killzone or they're handling Resistance now.
This could make for a nice mature game for the holidays.

Whatever happens it seems likely Horizon will finally get unveiled at E3. The same may happen for The Last Guardian, this could get a 2015 release date.

I think GT7 will be ready this year, it's probably been in development since early in the PS4's development, PD creates their assets at a much higher quality level than PS3 can handle.
If not GT then I think Sony will have another racing game ready for the holidays, possibly a Motorstorm or maybe a Wipeout for PS4.
Sony has a load of studios, many of which have been working on games for years, those titles could be ready to show at E3.


Nintendo has a load of old IPs they haven't used in a while on their home console, like Pilot Wings, Wave Race, F-Zero, Blast Corps, Kid Icarus, Metroid, Animal Crossing and Pokemon. They could announce a Wii U title for any one of those IPs.
I can see a few new IPs being announced, handled like Splatoon.

We'll see what happens.