I remember the 2005 contest between Australia and ROTW. Aussies had been beaten in the Ashes and then convincingly crushed ROTW in both formats. Kallis and Dravid post series said that ROTW hardly felt like a team and they were much lesser than sum of the parts. So you can't just assemble 11 players from across the world and hope to translate it to on field success. There needs to be team work, synergy, mutual respect and a common aim. A Pakistani player playing for PCT or his franchise in PSL will have an attachment to his team, put him in a world XI squad with 3 each from Aus/Eng/Ind/NZ/SA.. etc under a Windies coach and Kiwi manager 2 weeks before the match and I doubt it will be the same for him. They need to develop the team, the players have to spend a lot of time together and form a bonding which may take at least a few months. And they need to find motivation, Aussies playing for their flag will be out for blood.
If that is accomplished I see the current world XI beating ATG Australia everywhere except Australia, SA and maybe NZ. On Indian pitches it will be a massacre while they will return favour with interest in Australia. Again can't name just one team, there needs to be 5-6 different combinations especially bowling wise.
