US to decide on World Cup 2018 bid
If the US went forward with this bid, their biggest rival would obviously be England who has a number of major names backing them (Beckham, Blatter, Pele, Beckenbauer). It will be very difficult for anyone to overtake England, but if the US can push the profitability of the 1994 cup as well as point to the growth of the sport within the country, they might be able to pull off an upset.
However, even if this does not happen, a class losing bid for 2018 might set them up as the front runner for 2022. Then again, with China, Russia, Mexico, Canada and Australia all making noise about putting in for 2018 as well, who knows how this will all flush out.
In the end, I doubt the US will get 2018, but I do hope they attempt to claim the prize.