Rumour: Wii U Can Use More Than One Controller

[Livin in a box]

I seriously doubt that the screen was added "a few weeks before E3". You don't just add a screen, a lot of work goes into something like this. Manufacturing needs to change, development tools needs to be revamped. It's not something you just throw on a controller and then everything just works.

The only "big" problem regarding multiple controller would be that the system would need to render potentially different scenes for each connected controller. The actual streaming I can't see would cause problems, that is, if all controllers received the same rendering.

the console is not yet in production

You never know

I meant anyway that the touch screen was added later, the screen has always been there.