That’s a good starting point – contact sports. I don’t see any reason for them to go away (although I have some ethical qualms about 5 year old Pee Wee Football… but, well, other people can fight that fight and they will). But as physicals are already a part of sports programs, adding brain scans to the mix wouldn’t be too difficult in theory, and there’s money in sports, so funding wouldn’t be difficult, should the pro-leagues put a little of their earnings into the children’s sports programs.
After all, it’s an investment into the future of their own programs to have a healthy stock to work with. [sounds awful when I put it that way but then again, as a whole, I’m not a fan of sports-as-entertainment. But it exists and will continue to as it always did, so ..]