Putting a canvas or canvas elements on a plane

I'm doing a 2D/3D hybrid game. I have the 2D stuff down pretty well as far as the new UGUI is concerned. No problems with overlay worldspace or camera and no problems adding UI elements in amongst the rest of the UI elements in the world. However, I want to now add an animation where when a player clicks a button a canvas moves from off to the left and at a -90 degree x rotation to a 0 degree x rotation so that it kind of comes into view and has one edge pass near to the camera as it's doing...

Putting a canvas or canvas elements on a plane