I speculate by looking at the amount of work needed to be done for the next update,
There are about 5 images needed to be done, maybe 5 more sprites needed to be drawn.
Furthermore, the language mod system that needs to be tested.
I tried 2D animation once, its very time&mentally-consuming. So I can roughly speculate on how much time is needed to put on this art project based on complexity of the artstyle.
Still, just a rough speculation of my own, take it with a grain of salt.