As You Seen In The Trailer. You Seen The Big 3 Games Of Nintendo Being Played!!!! Are These Remakes?! Maybe Splatoon And Mario Kart Is, But What About The 3D Mario? Im Sure Thats Not 3D World. I Never Seen That Course Before! Omg!! Nintendo Please Take My Money And Give Us All The New Games!!!!!! Im Excited!!!  

I'm pretty sure they are just ports or enhanced editions, but not sequels. It would be nice if WiiU owners could get those games digitally if they already bought them for the WiiU.

The characters in Splatoon had different hairstyles so either it's an updated version or a new game, I think.  The Mario Kart shown also had King Boo, who wasn't in MK8, so this also is more than just a simple port at the very least.

Those are ports m8 (Maybe except Mario)

Could be a port with updated features for Splatoon, or a new game altogether..

I'm siding with the former

MK8 is a port but that definitely looked like Spla2oon. I saw new hairstyles!!

Anyone notice king boo he's not in mk8

Yea but I doubt the other's aren't ports. Not saying they won't have new itterations but I have played both and they seem pretty much the same.

Did you not notice that in the Mario Kart gameplay footage, players could hold 2 items. That's new from mk8 so it's probably a remake.

Mario Kart and Splatoon look different, maybe they are ports with new features or just brand new games.