BOTTOM LINE
Irrespective of completion status, as long as the stadium is deemed safe (per all legal/regulatory requirements), the games WILL BE PLAYED there.
If at some predetermined time point before the first game (canes or Dolphins) project managers determine that the stadium will not be 100% completed by that game date, then logic would dictate that they will spend the remaining time up to the first game making sure the stadium is safe and habitable, while then spending whatever other time completing the project, bearing in mind that they will have time in between games to finish.l
Unless there is some unavoidable safety/inspection issue, all games will be played. It will cost a whole lot less for Ross, the dolphins, and the canes, to play the games in an incomplete/ugly/cosmetically deficient stadium than to move games.