Keep this in mind: the ONLY reason why so many of the big clubs want a Super League is having much, much money, and NOW. The likes of Agnelli don't care about competitivity, don't care about the health and popularity of the sport in the long term, don't care about winning, don't care even if any of their clubs finish in last place! All they want is the money they will get now from having the wealthiest and most popular teams playing against each other in every week. It's 100% business and short term maximization of monetary gain. Their mentality is like being a president of company and rob it to the point that it will face bankruptcy after you're gone, but you don't care because you're gone.
Simply participating in the Super League will give any clubs in it over 300 millions, even winning the Champions League doesn't give you that much money. And with SO much money, anyone who participates will be able to strengthen their squads even more and make the financial gap even bigger than it already is!
So, the Super League is repugnant because of the fixed spots that many clubs will have.
Also, the Super League can't be as sucessful as the NBA and NFL because football is structured at its core in a drastically different way to american sports. The american sports have many mechanisms that keep the unequality between teams of growing as big as it is becoming in football, specially after Bosman happened.
2021 is just 2020 Part Two in all aspects. The pandemic, of course and all its consequences in, well, everything in art, sports, economy, our lives. This Super League bullshit. El Chavo Del Ocho still out of all world's TV networks. Bolsonaro and Lula.