But from Mayweather Jr. says, he will be the one to announced if the fight will be finally deal. I suspect that he might plays a big role as a promoter for Terence Crawford. There's no official statement though but all this speculations will be confirmed later on.
We can also speculate a lot with Mayweather's personality, his deep connections and influence in PBC. It is really possible that Bud already joined Mayweather Promotions secretly and might tell the public only when the fight is deal or after the fight. Or maybe Bud told Mayweather to help set up the fight against Spence. And if he can do the job then Bud will sign under Mayweather Promotions. Or maybe Mayweather is just talking to get some attention because he is scheduled to have another exhibition match. There's actually a lot of people talking with regards to the ongoing situation like Swift Garcia another PBC fighter.
We don't know what's happening inside unless they'll confirm our speculation.
Mayweather is a good promoter, he is like Bob Arum who values his fighters, so a fight against is a big gamble because the chance of Crawford to win is 50/50 or even less. Regardless, I think this fight is already due, fans are asking it so they have to grant it.