I fully expect Microsoft to eventually acquire Canonical, and if you pay attention to behind-the-scenes interactions between the two, it seems very likely.
As the other replies, I also agree with you, I've been a bit upset by Canonical for their support to Microsoft in making WSL, I'm not sure Linux has anything to gain from the thing, if not a bad advertising due to the suboptimal experience, but also it is a Linux system that has to exist under the government of microsoft which is a bit scary for me, but yeah I agree with you, I also see them working together for WSL, and at some point I see M$ buying Canonical
I suspect something similar. They have a good partnership. While we're dreaming, I'd love to see a version of Windows with a Linux kernel. They could do what they did with Edge, replace the core with something better.