Xbox One - Crackdown 3
PS4 - Uncharted 4
Wii U - Kid Icarus U (or Star Fox U)

I don't keep up with handhelds for the most part, so I can't really comment on them.

When you say first party I assume you mean games developed internally by a 1st party studio, which would rule out games like Tales and Lost Odyssey, which are developed by 3rd party studios.

Anyway, here's mine:

PS4 - New Naughty Dog IP
Vita - Gran Turismo Vita
X1 - PGR 5
WiiU - Xenoblade 2
3DS - New Metroid

PS4 - Uncharted 4
PSV - Gran Turismo Vita
Xbone - Halo 5
WiiU - Super Mario Galaxy 3

PS4 - Wipeout
XBO - Crimson skies
Wii U - Batallion Wars 3
PSV - Patapon 4
3DS - RHYTHM HEAVEN!!!!

halo 5 has been announced.  How has people not already seen it? I know VGC pretty much just shrugs off anything positive for XBO but surely this was in media somewhere.

We know a Halo game is coming in 2014, but the title has yet to be confirmed by Microsoft.  Axis Animation was the company who posted this new trailer on their FB page originally, which btw has now been removed and replaced with the original trailer that does not include the "5" in the title.   Nobody from Microsoft has confirmed Halo 5 as the title of the next game yet.  

PS4: MediEvil 3   (will never happen but I can dream right?)

Wii U: Star Fox Wii U

Xbox One: Banjo Kazooie Three (assuming it is a platformer game and not whatever the hell nuts and bolts was)

3DS: Majora's Mask 3DS

Vita: A new God of War game

Yea i know Halo has been announced but we dont the title of the game as of yet, and tbh i cant think of any other games.

PS4: Media Molecule's game!
XBONE: Halo, Fable, and Forza are all accounted for. I'll have to go with black tusk if that counts.
Wii U: Zelda
3DS: Mario3DUniverse
Vita: doooooooooom

X1 - Conker's really bad fur day