"After revealing that Mega Man 4 would be coming to Virtual Console last week, we can now confirm that you'll be able to download Capcom's retro platformer on 16 April. Originally released on Nintendo's first home console in 1992, this one sees our robot hero attempting to stop Dr. Cossack who plans to eliminate Mega Man to prove himself to be the greatest robot designer of all time. This time he has the ability to charge up energy inside his Mega Buster, allowing him to then fire larger and more damaging blasts."
Still no word on a North American release, but it shouldn't be too far off now. Thanks for the tip, Jim.