As an Australian, I'd love to see the actual birth of CANZUK... https://www.reddit.com/r/canzuk/. That could be a viable Union with real international influence.
I genuinely applaud the sentiment, but it's no longer possible. Maybe back in the 1990s this would've been an excellent trade block but all countries are no longer similar or internally homogeneous enough to make such a prospect functional. Much of the type of trade anyway would've been defense in nature, and that's sort of emerged as a big problem across all potential members.
Canada, Australia, and New Zealand have to grow up…
The United States needs to realise it isn't the superpower it once was, nor the superpower it evidently seems to continue to view itself as.
Two terms of Trump and mishandled foreign affairs has real consequences.
UK has the finance & global influence (Commonwealth) - Canada & Australia have the resources. They all can grow. Together.