Here's the full run down, via Yahoo! News:
"Tokyo are the favourites to win the bid to become host city at the 125th IOC Session in Buenos Aires on September 7 with Istanbul also strongly fancied in what is their fifth attempt at trying to secure the Games.
Madrid meanwhile, who are bidding for the third successive time, are little more than outsiders due to Spain's poor economy as what began as a five-strong list gets set to be whittled down to one in less than eight months time.
Baku and Doha were cut from the list in Canada in May with Tokyo, Istanbul and Madrid's candidature files spanning several hundred pages in order to represent their plan for organising the Games."
The International Olympics Comittee's Evaluation Commission—led by Sir Craig Reedie—is expected to visit all three cities for four days in March starting in Tokyo then Madrid and finally Istanbul before publishing a report in June with the 2020 Candidate City Seminar set for July.
Where do you guys want to see the 2020 Olympics? Let us know your opinions.