It still has all the hallmarks, different setting, tactical defence mini game instead of the trial. I think the trip up might be change in genre conflicting with the "one person dies per mini game" but maybe they can weave a strong story or make that compelling in itself.
Well, Danganronpa was already in a bit of a niche, and now mix that with the niche Fire Emblem fandom, either this game was only made for the Japanese market, or the developers must have some ace up their sleeve marketing.
Most people who liked Danganronpa probably will not like the tactical strategy mix up, and the people that like Fire Emblem probably won't like permanently losing characters for story reasons so quickly. And FE had ways to revive dead characters, which is not something Danganronpa had because what impact is there when a character that dies can just be brought back to life?
Its like taking an already sort of small audience and then cutting out a smaller slice.