Complex sentence: On June 3,2012, Nintendo officially unveiled the final version of the controller, named "Wii U GamePad", in a video presentation preceding E3 2012: the presentation confirmed the leaked changes, and unveiled other features making use of the screen.
Split into simpler sentences: On June 3,2012, Nintendo officially unveiled the final version of the controller, named "Wii U GamePad", in a video presentation preceding E3 2012. The presentation confirmed the leaked changes, and unveiled other features making use of the screen.