I think the NFL should show their remorse by airing anti-racism commercials, putting anti-racism slogans on helmets, and putting big messages against racism in end zones. I think that will satisfy their critics.
In it he accuses Dolphins owners Stephen Ross of offering him $100,000 for every loss in an effort to tank for the No. 1 draft pick during the 2019 NFL season and includes texts he alleges are from New England Patriots head coach Bill Belichick demonstrating that the Giants conducted an interview with Flores while knowing that they already intended to hire Brian Daboll as head coach.The suit alleges that the Giants interviewed Flores simply to satisfy the NFL's Rooney Rule mandate requiring that teams interview minority candidates.
I'm not an attorney but it seems that neither of these is the basis for a lawsuit.
OTOH, Flores just guaranteed he will never be hired again in the NFL. Plenty of other black head coaches have been fired - Romeo Crennel, Anthony Lynn, Ray Rhodes, Mike Singletary to name a few - and no one ever brought a lawsuit.