You forgot the Pinball Arcade!

Is Saber Rider a sequel to Run Saber? I have been dying for one since I finished it.

Afraid not. It's a video game adaptation of this:
http://en.wikipedia.org/wiki/Saber_Rider

Any speculation on what the "unknown" games are?

unknown Miyamoto project TBA
unknown Headstrong Games title TBA
unknown Retro Studios title TBA
unknown big franchise Square Enix port TBA
unknown Team Ninja "action" title TBA
unknown Ubisoft title TBA
unknown new IP from Straight Run TBA

Miyamoto's game will probably be a completely new IP. That mother-in-law simulation he once discussed?
Headstrong Games has created a bizarre line-up of games. Battalion Wars U? House of the Dead U? a new IP?
Retro Studios. Metroid? Star Fox? this is probably the most exciting one.
big franchise Square Enix port. Signs hint towards Deus Ex: Human Revolution, but other rumors suggest Sleeping Dogs and Hitman: Absolution.
Team Ninja "action" title. Probably not a Ninja Gaiden.
Ubisoft title. There is at least one more that isn't Watch_Dogs or Rayman. I'm guessing it's a Tom Clancy game. Rainbow 6 or Blacklist or both. South Park seems like a possibility since they acquired it, but this particular game was confirmed before they grabbed South Park.

Square can keep Final Fantasy far as I am concerned. Sleeping Dogs which is fantastic and Hitman are something I dream about.
HeadStrong Games : Battalion Wars U please
Ubisoft: Has quite a few titles coming and a follow up to Zombie U is something we can possibly look forward to in 2014. Look for Rayman,Watch Dogs,Rainbow Six this year along with another Assassins Creed and (cosses fingers) Splinter Cell Blacklist
Retro: Said this many times. have to believe its Metroid and a new IP. Maybe not 2013 but 2014 for sure
Platinum: Something tells me once Wonderful 101, Bayonetta 2 comes out there will be future releases with Nintendo and this where a possible Starfox will come from.
Think the big wild card in my mind, http://www.valhallagamestudios.com. Devils Third does not have a publisher and it would make since for Nintendo to fund this project as the game is no doubt nearly complete.

Thanks for posting this! I'm going to bookmark it so I don't have to Google each game. I can't wait for Wind Waker HD and the new 3D Mario!

Monster Hunter is the only game anyone ever needs... You won't have time for anything else in the end

That's the only game I'll never need. I'd rather spend hundreds of hours doing something more constructive with my time like knitting a collection of Golden Girl sweaters.

The amount of games Nintendo have planned for the WiiU is outstanding. It's just a shame that the development times are so vast. There's such a huge gap in-between release right now.

I think Nintendo should try to get more indie-devs to release games on the eShop, just to fill these gaps. The eShop is a great way of taking focus of off the retail titles and get people to focus on smaller titles in the meantime. I think the eShop is very underused at the moment. The 3DS has a great momentum right now, it doesn't need more eShop titles to fill any gaps. They should put more focus on the WiiU right now in that department. Then go back to 3DS when that system gets a bit dry in-between releases.

Agreed. I counted no less than sixteen first-party retail titles that have been confirmed to be in development, and with the exceptions of Wii Fit U and Wii U Party and to a mild extent Game & Wario, every single one of them is considered a pretty "core" title. Imagine how much more impressive this list will be come E3.

Picking up the pace on the Virtual Console would seem to be a good way to fill gaps in the release schedule, but I get the feeling that from the end of March things will be ticking over nicely.

This should apply to every video game.

No kidding. Most things are more worthwhile than playing video games; I don't play games to do something constructive!

Updated with all of the latest since I originally posted this about ten days ago. Lots of eShop confirmations like Cryamore, Dusty Raging Fist, and Another Castle. and a couple third party confirmations, like the major Assassin's Creed IV announcement.

I've also added the "Recently Released" section so you know whenever games come off of the list and you don't miss anything you care about!

Starting to look like quite the list!

I know Rebellion is working on Sniper Elite V2 for Wii U but I think it would be cool if we got Sniper Elite: Nazi Zombie Army as a downloadable game as well.

http://store.steampowered.com/app/227100/?snr=1_7_15__13

Yep that list makes the Wii U look like a doomed console.

I've said it numerous times before, but I'll say it once again. This E3 is going to be an absolute blast!

Indeed

Yeah Wii U is definitely dead LOL