If you click on it you will see that they officially announce pokemon battle revolution online for the wii. a little farther down you will see some release dates
2 key ones:
Mario Party 8: May 29th
Pokemon Battle Revolution: June 25th
I cant guarentee the authenticy of this article 100% but its from the nintendo press room, so its probly pretty reliable
P.S. Brawl is obviously not on the list so people can quit saying that game will be out in june...