There is a rumour going around that the next Fire Emblem game will arrive on the 3DS and be titled Fire Emblem: Blue Sacred Sword and Red Demon Lance.
I dont know if that is the name of one game or two. But anyways here is more info thanks to magicbox.
The game will take place 100 years after Sealed Sword, the story centers around Princess of Kingdom Bern and Prince of Kingdom Lycia, each will have different story in their perspective. The game will also have new Casual Mode for beginners and Lunatic Mode for advanced players.