Neah, that won't happen, Federer is a broken down dinosaur, Nadal is also missing time with injuries and I'm pretty sure ATP will drop all the money for the Next Gen guys (Sinner, Alcaraz, FAA etc.). Any breakaway series only has sense at the height of the given federation's power (darts & American open-wheel in mid 90s for instance). If the tennis breakaway happened it should have been when the Top 4 was at its top (mid 2010s). Now it's too late IMO.