i personally feel like this is an idea that looks good on paper, but when you finally see in action seems to not work as well. fire emblem is a primarily handheld game because it lends itself to a handheld playstyle: you can pick it up and play for short periods of time, sprite characters look good on the squared field, and the fighting, while strategically interesting, isn't super flashy.
however, when you put it on console it requires you to do some things you don't have to on handheld, like put it in nice 3d polygons, render the map, add more visual flash to the game. i personally think it also slows the pace of the game down in that when you sit down at your console you're not likely to play for a few minutes at a time, but instead an hour or half an hour. now, i do this with the new fire emblem on 3ds and it works fine, i enjoy it that way too. it just seems to me that having it on console doesn't add much to the formula, and potentially takes away some of the elements of charm, such as texted cutscenes (generally a no-no in today's console generation) and 2d sprites.
though i could see them being able to do some cool things with the wii u gamepad to add to the gameplay. who knows?