Add the Belgium/Netherlands bid as another obstacle for a North American World Cup in 2018.
The two European neighbors tossed their collective hat into the ring for 2018 as Belgium and the Netherlands will look to co-host the 2018 World Cup. England is the favorite but other countries including the US and Mexico have expressed interest.
After the difficulties of a two-nation World Cup that was held in 2002, I thought FIFA would no longer be open to co-hosting a World Cup. Japan/Korea had several of logistical problems that arose because of the co-hosting. I was in Japan, did not go to Korea but heard plenty of stories about difficulties in getting back and forth between the two nations.
Of course, you needn't hop on a plane to travel back and forth between Belgium and the Netherlands. I see that as more of a likelihood than USA '18 or Mexico '18.