If we're going down this route, if Shazam does end up rotten on RT despite early praise and it's box office suffers for it, unlike JL it only cost 90M so it should make a decent profit regardless. JL budget was over 300M. So one can say it's to be successful with that budget.
Has FF ever been about street racing though? That was just a secondary element to most if not all of the movies. It's always been about an action franchise using cars as the main ingredient.