None of my rhizomatic plants use the calendar year to be reborn in a new separate space.
I don’t think you can or should try to repeat the experience; it will never be exactly the same as the first round. It can and should be different. Why be bound to time? #rhizo14 as a handle need not represent the current date, it could represent the birth of the community (a consideration for hash tag thinking is if you want to anchor it in a year) (hindsight).
You will and are getting feedback but you also get to decide. I wonder what would happen if a rhizomatic community collectively expressed a desire for an unrhizomatic structure (not likely but a curious scenario).
Good luck with the coin flips