Chrom
Chrom is the main character of Fire Emblem: Awakening. He is confirmed to appear in an unknown capacity in Super Smash Bros. 4.
In Super Smash Bros. 4
Chrom appears in Lucina and Robin's trailer. He first appears at the start, where he is shown unconscious after a battle with Captain Falcon. Lucina defends him, but is almost defeated herself. For the majority of the trailer, he is only seen laying on the ground. However, at the end, he, still badly hurt, remarks that "he will get his chance next time", followed by the subtitles stating that he will get his chance this time. It then shows him in battle and, before he lands the final blow, the trailer ends. Despite this, he was not given a page on the official website. Therefore it is unknown what his role is. He also appears at the top of Lucina and Robin's poster art.