Well, first of all, 80k J awards to Europe for the World Cup might be hard to come by. Before shuffling miles/points around, first check availability and see if you can get something booked and put on hold.

Different airlines are more or less lenient on award holds. Signing up for all of the credit cards for the airline signup bonuses is a great idea in general, but sometimes they take their sweet time posting. Amex and Diner's could be your aces in the hole as you can expedite the movement of points to miles. If Airline X says "We've got your ticket, but you have 2 weeks to find the miles", Diner's might be able to help, but a new MC/Visa account would not.