It would seem a new Fire Emblem game is due to be revealed very shortly. A brief snippet of text in Japanese publication Nintendo Dream states the following:

There has been no information about a new game for a while, but...Fire Emblem fans, look forward to the next issue!" Later in the same magazine, again whilst talking about the next issue, it states "And the blockbuster game is revealed...!?"

Wow, we just got a new game on the DS, and the art doesnt loan itself to a wii game... maybe a vc release or a wiiware game?