We've datamined several brand new weapon models on the Patch 11.0.7 PTR, from clockwork guns to a whole line of Lunar Festival holiday appearances!
There's not much information on these yet, though the Patch 11.0.7 preview video showed quite a bit of machinery on Siren Isle, so it's a good bet that these appearances are related to the erstwhile mining operation.
Though we have no information yet on how they will be obtained, these are clearly related to the Lunar Festival holiday in January. The mace in particular looks pretty wild, appearing to be a type of flail.