Just wanted to connect some dots, sorry if this has been done elsewhere.
The next hunter (the third of those teased at released), was briefly shown in the Tetra trailer. Her codename in files has been 'alchemist', and we can see here she's set to be a witchy magician with potions attached by pseudo-magnets to holsters, likely to lob. We also see her wielding what looks to be a large staff or device, notably with a throttle on a perpindicular handle.
Now, combine that with another notion - a dev comment led many players to believe an upcoming hunter would have an ability derived from one of the powers of open beta, and a commonly speculated notion was that this would be the ability mortar, an overhead shot with a potentially strong range.
Given the nature of Alchemist's 'staff', it seems credible that staff is either a mortar/artillery weapon or could double as one, and have a power derived from the Mortar power in some way.
We'll find out the truth in a week and a half, but wanted to pose the possibility because it seems fun.