Just a note that this is like some dream scenario stuff, but let me dream guys.
Nintendo - Smash Bros Wii U release date (and 3DS of it isn't announced before June), Zelda Wii U, Hyrule Warriors gameplay with release date, Bayonetta 2 gameplay, Animal Crossing World Travel (Wii U with much bigger towns and up to 12-16 players in a town at once), X gameplay and expected release date, 3rd Gen Pokemon Remakes, more 3DS stuff, and Super Mario Galaxy HD for Q4 this year.
Microsoft - All I need is a Kinectless Xbox One bundle and I'm sold. Probably some Halo stuff too, not much clue what else.
Sony - I expect some Playstation Now info, GTA V being ported to PS4 first exclusively or something like that, exclusive Destiny Beta stuff and some gameplay, Final Fantasy XV trailer and an official Kingdom Hearts III release date (probably the most far off idea). Persona 5 for PS4 in the West, last TLG is not dead trailer.
Other things I want to see is Assassin's Creed Unity stuff and WWE 2K15 on current gen, and for the love of god give me Survivor Series 10 man tag matches.
Feel free to make fun of this stuff (especially Nintendo's presentation

) but I'm a bit of a dreamer.