By joining Lionel Messi to Miami, it will create a passion for football there, of course it will have a positive impact on football there. Actually this is a breakthrough if a league wants to get a lot of attention, yes one way is by bringing in players with star labels. As before what Al Nassr did in Saudi Arabia, it was good for them.
as one of the countries that will host the 2026 world cup, messi's presence in the usa league will add to the impression of prestige, moreover messi and cristiano have the same star aura. I can say the future of the USA league will be better with Messi's presence there, and people will start to look at the USA league and also the preparation of the USA as one of the hosts for the 2026 world cup.