I doubt it will come out in North America (although we USED to actually get Rugby games released here on PS2).
EA Sports released a few Rugby games over the last decade... 04, 06 and 08 I believe.
I'd be worried about the controls. Certain sports games just don't work well with motion controls. Golf, bowling and tennis are all great... whereas football is not so great. I'd be afraid that Rugby might wall into the same category having some basic similarities.