A3: Sadly, yes, there will be widescreen and fullscreen discs available in North America. Note that it's only the 2004 SE version that will be fullscreen, though: I believe both FS and WS versions will have the same non-anamorphic widescreen OUT included.
A4: It looks like at least Best Buy Canada will have an exclusive tin case containing all three films. The price at the moment is CA$ 87.99. But strictly speaking, the three films are available individually for the first time on DVD.