I am really curious about the bow, I love bows and the fact that we get to use one is incredibly exciting. I think it should funtion as a cross between a charger and a slosher if that makes sense, it seems to have an arch which would mean that aiming it up, like a slosher, could make the ink bolts fall down onto people behind cover. If all three shots hit a target, it's an instakill, it appears that depending on how long you hold the charge determines the range and number of shots it fires at once. In the trailer, it was shown, albeit briefly, that the bow fired only two shots instead of three, which is why I have come to this conclusion.
Additionally, the bow would switch between horizontal and vertical positions, making me believe that it has two modes of fire, one that's better at inking and one for sniping. It seems likely that this could also have a shorter ranged, faster variant and a longer ranged, slower variant, I'm basing this theory on long and short bows that exist in real life.