It most certainly will be an energy weapon simply because the most well known roll of it from d1 was triple tap firefly. So in order for bungie to suckered people back into the game to grind for it they have to give it the nostalgia roll of triple trap dragon fly. In all honesty the gun will be absolutely horrible compared to its d1 version because of how d2 handles weapon balancing. In d1 you didn't need to have a godrolled weapon for it to be viable in any content since all the weapons were viable to use and felt good to use. But in d2 if you want a weapon to be even remotely viable its gotta have a damage boosting perk of some kind as well a reload perk and even then it's not guaranteed to be useful at all.