The game formally known as 'Fire Emblem If' has now be renamed to 'Fire Emblem Fates' for the American release, slated for 2016.
Not much was shown other than an English version of the trailer with some genuinely lovely animation and english voiceover work. We learned earlier this year that there will be two very different story paths to follow in 'Fire Emblem Fates'. It follows 'Fire Emblem Awakening', which was very well received.
Shortly after, Atlus's 'Shin Megami Tensei X Fire Emblem' was shown. It was however, all in Japanese, so I don't have much information other than the trailer itself. There are brief glimpses of gameplay, which looks to be a role playing game with, well, Fire Emblem characters. Would've been nice to have subtitles at least, but hey, it's a cool crossover. I will update if more details come out.