In the Japanese Nintendo Direct, Iwata mentioned that the Fire Emblem TCG series will be relaunched this summer, alongside Fire Emblem: if (Fire Emblem 14). He didn't spend a lot of time on it, but he did show cards of Marth, Caeda, and Tharja.
The TCG will likely be Japan-exclusive, sadly. But the artwork looks really nice, I hope some characters who didn't get much artwork before will get a second chance.