They're not going to demolish it after all the renovations they already put into it. Are you guys thick?
It's not going to be in Miami either. The current location serves the tri-county area best, and as there are only 20 games to go to if you count the playoffs, it's reasonable to have a more central location that everyone makes a trip to. The infrastructure is already there. What they need to do is make that whole surrounding area more convenient for tailgating, and then put up a european-style roof to protect the stands from rain and sun.
Mike Dee already submitted the stadium concept to the superbowl committee a year or two ago. It was in response to having lost the 2013 superbowl to New Orleans. The interior photo from that concept has already been posted. Here's the outside:
I would rather have them go for a centeral arch over the stadium that serves as the spine holding up a suspended roof, and then give it a bit of a dorsal fin shape, but something like that would be super expensive and much more complicated than just the four post setup seen in the concept art. Any progress will be evolutionary rather than revolutionary. They can't afford to close that stadium down to create something spectacular. Something that big doesn't happen overnight.