I went back and looked at Nintendo's Direct, and did a count:
Smash Bros -- Ensemble cast, could consider Mario, Little Mac, Pit, and maybe Link to be "white males"
Zelda U -- Link, maybe
Pokemon -- None (customizable, right?) -- I think all Asian... maybe two if white (not that familiar with Pokemon, sorry)
Bayonetta -- female and minority character leads
Hyrule Warriors -- Link, again, if you count him, but several playable female characters
Xenoblade Chronicles X -- maybe? too soon to say, they look to be from US but that doesn't mean white necessarily
Mario Maker -- Mario
Splatoon intro -- 2 girls, 2 boys, "squid people", the orange girl seems to be the "face" of the franchise
Kirby, Yoshi, Captain Toad -- no white males
Unless you think Japanese game makers view their characters as white instead of Asian, it's a pretty diverse lineup. Overall you have to wonder if it's mostly a western issue.