Well...you still have 3 months to prepare and find:
- "Money" and a good bank account;
- A back end registry provider for your technical operations;
- A service provider unless you operate your entire TLD yourself;
- A service provider for your communication: PR and marketing (unless you want to do it yourself);
- A DNS service provider unless you have your own network but I doubt it;
- "Sellers" or Registrars unless you do not plan to sell domain names;
- An external validation agent;
- An escrow provider because ICANN wants to;
- Someone able to manage auctions if part of your plans are to auction domain names.
nb: TAS opened today.