Actually, given EA's financials recently, a sequel to a game that broke even or barely profited still might be one of their best options.
So this doesn't really confirm that Boom Blox was a success.
Still, kinda big for Wii. They need third parties to keep pushing stuff like this until something hits the right chord. One surprise mega-hit could open the floodgates.
"[Our former customers] are unable to find software which they WANT to play."
"The way to solve this problem lies in how to communicate what kind of games [they CAN play]."
Satoru Iwata, Nintendo President. Only slightly paraphrased.