traditionally superbowls are held in climate controlled venues (having a roof or being warm weather areas) so that's why I think Denver faces an uphill battle to get it. KC almost got the 2015 Superbowl, but for a lot of reasons, one of which was the inability to get a rolling roof built during the renovations, that fell through for them. For the one in New Jersey, I expect that exception to the rule has much to do with politics as anything and its huge media draw as others have already stated. If successful it could lead to other exceptions and Denver might have a chance after that. And who knows the presence of both Elway and now Manning might have some influence, not because we'd be playing in, but because that really has put Denver more in the media spotlight.
But the worst idea for a Superbowl I read has to be Goodell's proposal to host it in London at Wembley. I don't think it will happen, but it is ridiculous.