Announce the teams that there is a prize of 1 million Euro for them. They should rethink their party for using the 1 million Euro, as the budget for the party, which is planned in three months from now. The best party receives the 1 million Euro to make it happen.
They should plan the new party using the same Evernote app and the template for organizing a party.
At the end, one member of the team has to present and pitch their party idea in the big group.