Despite continued demand, analyst Evan Wilson says Nintendo has finished work on a third DS model, but it won't be released for a while.

"Our contacts indicate that a refreshed DS is complete," Wilson said on Wednesday as transcribed by GameSpot. "It is thinner (it has no GBA port), has on-board storage, and larger screens.

"However, we do not expect a revamped Wii or DS until sales begin to tail off in all three major geographies," he added.

Since first launching in Nov. 2004, Nintendo has sold 55 million DS systems. A year and a half later, the company released the DS Lite.

Nintendo released three different versions of its previous handheld, the Game Boy Advance, throughout the course of its life. The original in 2001, followed by a clamshell remodel in 2003, and a "micro" version in 2005.