His signature weapon isn't one though, and considering their statement (which, like i said in the other thread, likely meant that having too many characters could translate into very similar movesets across all units, especially when sword units would be the majority anyway) there's no reason to assume that he'll be able to use anything other than that since he's mainly a mage with a unique, divine weapon.
The lords from Fates are also different from each other. For example Corrin is also a dragon, and Xander has a horse (and distant counter that could potentially translate into a ranged attack if they want to adapt certain mechanics), so their movesets should be completely different. I can see Lucina, Marth and Chrom being similar, but they're way too important/popular to be left out, and there's still room for variations. I also think that most of the main characters from other games will be added as DLCs anyway, regardless of current statements for the initial roster.