EEDAR analyst Jesse Divnich believes that Nintendo will be releasing a new handheld in the next 15 months, and that they will make the announcement within the next eight months. That’s not all that surprising since they have to keep up with all of the other tech out there.
There isn’t any solid evidence here, so take it with the usual grain of salt for now. Though if true, I wonder what the big selling points will be. They have to keep Mario in step with the other handhelds and the DS is in serious need of a refresh.