In 2019, Don Garber and MLS announced they would expand to 30 teams. A year later, Don Garber said the cities of Las Vegas, Indianapolis, San Diego, Detroit, and Phoenix were clubs interested in joining MLS. Four of those cities had a USL or NISA club at the time of the announcement. Today, one of those USL teams has ceased to exist, another may be in jeopardy now, and the NISA club is now a USL club.
On April 25th, 2024, the Mayor of Indianapolis, Joe Hogsett, announced an unnamed ownership group would put in a bid for an MLS club.