KnapNok, Gaijin, Black Forest, WayForward, and Two Tribes "have something pretty nice coming for Wii U owners" this week 

On Twitter, Two Tribes has teased something coming from the studio as well as other indie developers for Wii U this week. KnapNok Games, Gaijin Games, Black Forest Games, and WayForward are the other teams involved.

I can not imagine it is only a discount on all games. Why should they do this together ? I think we will see a Nintendo Direct. 

Edit : maybe it is a bundle with their games

Bundle : 

Mighty Switch Force! Hyper Drive Edition (WayForward) 
Spin the Bottle: Bumpie's Party (KnapNok) 
BIT.TRIP Presents...Runner2:Future Legend of Rhythm Alien (Gaijin)
Giana Sisters Twisted Dreams (Black Forest) 
Toki Tori 2+ (Two Tribes) 

I hope the surprise is good.

A save the Wii U alliance ! Legions of indie developers to join soon.

Spin The Bottle?  Wii U saved!

After the Wii, is surprising how good Nintendo are now with indies

wiiU less dooomed?

The Wii U is starting to remind me of the Vita. Little support save for the ocassional big 1st party game and a bunch of indie stuff and ports. The main difference is, Nintendo's 1st party games are bigger deals than Sony's and the ports Nintendo is selling on the Wii U are about 20 years older.