Dubai may put in a preliminary bid for 2020 but they have zero chance of getting it. It could only be held from October to May at the latest. Plus Dubai has never successfully held a large scale event, even the Asian games in Qatar were a total disaster. Dubai would need to hold something like the world student games first plus Israel would be a huge problem and the US delegates would not back an olympics from which Israel are banned.

I'd say cricket is the only hope.