All possible new Olympic sports.
… a decision due at the IOC Session in Buenos Aires in September 2013. The IOC Executive Board will add another to the mix in February when an existing Olympic sport gets cut. …
… While baseball-softball, karate and squash have the finance to promote their bids internationally, some of the smaller federations don’t have the money to invest in promoting their profiles globally. …
Around the Rings – IOC Warns Sports Bidding for 2020 Olympics Against Lavish Spending
I’d wager on recently merged baseball-softball getting back in. Then roller sports.
Personally, from that list, I’d vote for sport climbing.