When are we getting new the Tristana splash arts?

Can we expect (some of) them this month or later in the year? After seeing a part of what can be presumed as Riot Girl Tristana in that new Armor of the fifth age Taric Splash art, I'm really curious. And yes, Art takes a LOT of time, especially for splashes this detailed. I also realize that Tristana isn't first in line for the new splash arts (Trundle and Nidalee were discussed along with others)... but still, I'm curious.