The Marlins have released their new stadium site and you can find it here:
or if you prefer Spanish
Cruise around the site, in which ever language you are partial to. There are no renderings of the stadium, yet. But hopefully they will be coming soon. Probably after the contracts are approved by the county.
In the meantime, all have to say is: there is a lot orange on the site. And I don't consider that to be a good thing.