I'd say the holidays too.
I would guess it gets unveiled either at E3 or in a press release or Nintendo event around E3, in prep for a holiday launch.
"[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.