When people think of IMG, they think of their “national” team, the one that goes everywhere. But they also have team that plays mostly other Florida schools. It’s the latter that’s coming to Indy, I believe.
From the IMG website:
“With three teams competing across various levels, IMG Academy football will identify which program is the best fit for prospective student-athletes grades 6-12 as well as for post-graduate players based on their age, skill level, position, and overall goals. IMG Academy is a full member of the Florida High School Athletic Association (FHSAA), and the National Team competes as an independent. IMG follows the practice requirements and standards issued by the FHSAA.”
https://www.imgacademy.com/boarding-school/athletics/football