I'll never go back and find these posts but I can remember two exact posts that laid out the entire subclass perk tree nodes and they both suggested a bow for a super. One of them even had the grenades as a smoke not the melee however. Of course you'll just have to take my word for it but this is evidence enough that these posts did exist and that bungie could have perhaps drawn ideas from them. But I have no proof for anything so yeah, there's that.