I'm making this post by myself but I think will talk by all BTPro community :)
CityMania, as successor of Novapolis and previously Luukland, is making "baby steps" now.
I wanted to leave here the best wishes and some ideas:
1 - BTPro is making a "Novapolis Tribute Tournament" on June 21th, all are invited to join, play or watch;
2 - CityMania could make a tournament when servers go live, to celebrate. Since not on June 21th (:P), we'll be glad to participate too;
3 - I'd like to revival TheDude's idea of InterCommunities tournaments - CityMania, BTPro, n-ice, Vulturis, Reddit and probably some other OpenTTD communities that maybe we aren't aware of ^^
Special thanks to dP and good luck on final setups :)
Edit question: would #openttdcoop join the party? ^^