It's totally Gacha characters. Weapons don't have the same 'gotta keep pulling' cache. The FE characters are the money draw.
That doesn't mean there won't be a weapons gacha as well like Terra Battle does.
That's what people usually assume, but I've noticed that increasingly companies have actually moved towards not having gacha characters at all. Instead they give characters out in events and in the story, while balancing the games such that the characters themselves are useless without good equipment. It's quite the opposite of the Terra Battle design philosophy.
Remember, it is way easier to create equipment content than character content, since they don't need to animate, and their "value" is basically just numbers in the system.