I hope they make a Green Haired Lord this time. And make him use Bows, Axes or Lances or something. Or a combination of all? Then again, it's hard looking regal with a axe or spear if it's gonna be a prince. Hector and Ephraim where badasses, so it works for them to fight rough and wild. Ike did it to despite using swords (he was no prince though).
I dunno, the next Fire Emblem main character could as well be a regular rebel, creating an uprising AGAINST his kingdom for the sake of diversity. That hasn't been done as much yet, outside of Celice. And maybe Sothe and Micaiah a little even. Then it would make sence if he would fight more wildly like Hector, Ike and Ephraim. He could, however, focus more on agility than them.