Don't know if you guys caught this during the direct but more Marth Amiibos are indeed coming. As you all know this was a hard one to get in wave 1 and supply dwindled quickly. Turns out Nintendo is recognizing the popularity of FE and the characters and have decided to finally capitalize/push forward with them. Hopefully for those of you that couldn't get your hands on them can now rejoice at having a second chance and hopefully this means FE becomes (although I think it already is) a more prominent series in Nintendo's catalogue.
http://attackofthefanboy.com/news/marth-amiibo-coming-can-used-code-name-s-t-e-m/