I understand with your answer "Probably. Eventually." that you are a little bored with this kind of request. Myself, I use a Ultimo 4K and I'm really in need of an OpenPLi image.
This being said, I know I will get nothing more than what you wrote above.
Waiting for OpenPli Image is also for me an opportunity to test BlackHole and VTi images. I have to say that I cannot find anything better than OpenPli.
So, I'm sure we'll get soon a Ultimo 4K image. I just wanted you to know that I value your work and am thankful for it.