Yes, we are considering OpenELA for many reasons. It's backed by big companies with a common goal, so it's probably less risky than other choices (but Alma is also an interesting choice anyway).

As usual, it will be loosely based too: it's relatively impossible to "transform" a regular distro to XCP-ng, but it is very helpful to re-use many packages as possible for reducing the burden of maintaining them all 🙂