Remember that negotiations could not begin until the incentives bill passed, meaning the framework discussed in recent months may or may not undergo changes. And remember, too, that one of the big selling points of the team headquarters project is its ability to generate related private investment. Panthers executives have estimated the full buildout in the range of $1 billion — meaning four times as much investment by other groups as the team’s estimated $200 million construction tab. The team headquarters will account for 30 to 40 acres of the site, or roughly 20% of the property.