A rugby league type breakaway will happen sooner or later in my view, hard to say which side of it we will be on though at this stage (although I know which side I personally would prefer as a fan).
Is an English representative quartet of City, Spurs, Leicester and Wolves in a European comp really any less attractive to viewers and broadcasters than a comp that includes shit Utd and Arsenal teams?
Why would great footballing clubs like Ajax, PSV, Atlanta, Valencia, Bilbao, Porto, Benfica ect choose to be in the 2nd level of a competition they have little chance of ever progressing in when they could potentially breakaway and be part of a fairly run competition.
What’s to stop a breakaway inviting the likes of River Plate, Boca, Flamengo and Palmeiras to compete as we do seem to have FIFA (or at least Infantino) as an ally.
A lot of South American fans only follow european teams purely because their chosen club do not compete in the big european competitions, a breakaway league that is fairly run could not only compete with but eclipse any closed off European Super League that the G14 may be dreaming of.
I would be very surprised if talks around this type of thing have not already happened and depending on the outcome at CAS ready to be put into place