The trailer for [b]Arc Week[/b] suggest that the Arbalest will be dropped in that event at some point. That said, it could also come during [b]The Revelry[/b], or even potentially from the [b]Invitations of the Nine[/b], the new Xur bounties. I doubt the Former of these choices, but even if there isnt a concrete weapon/armor reward, I will be pleased. The new lore about the Nine is still Incredible!