The finalists must confirm their participation; if they cannot, they should choose a replacement from among the other participants. It is more difficult and expensive for Siberia and the Urals to decide.
We need to vote on the rules and schedule (May Day holidays or Victory Day).
Some haven't played on the World Tournament (WT) before, so they need to practice a bit with the final rules.
And I need to know the exact number of players so I can plan the seating arrangements, book hotel rooms, etc.