ketchuplover: there is no 'official' site championships.For some years, there were inofficial 'World Championships', for all games, but I think whoever did those stopped doing them - I haven't seen any in awhile.
If you think we should have them - like for 2016 - I like the idea - the search for that tournament and check how it was setup (maybe message with the creator if you want to be nice) and set them up. I would participate.
Make sure the timing settings are so they appeal to a broad audience, to get maximum participation, and chose a style that doesn't drag the tournaments out forever.