V5 is not a single thing and likely won't go out in one patch. It will likely have individual components released as and when they are ready, on the way to 1.0.
Some improvements can be applied to all planets at the same time and require no work from anyone, some may be rolled out planet by planet and others may require a pass on everything at once.

Not necessarily a direct answer to your question, but should hopefully paint a better picture of how we plan to roll this out. We also weren't able to show everything we are working on at CitizenCon, but we are excited for it all :slightly_smiling_face:.