It's a bullshit lawsuit that you will never hear about again.
Reasons it's obviously bullshit - 1) There was complete disclosure that Brady and co were being paid to endorse FTX and paid via shares (that was the whole point, they couldn't have publicised the details of the relationship more). 2) Only the name grabbing celebrity endorsees have been named, not the many businesses and non-american celebrities that partnered with them. 3) FTX was primarily an exchange, not an investment scheme. 4) Actual investment schemes and funds sponsor hundreds of companies and athletes and that ecosystem wouldn't exist if the people getting sponsored were liable for what happened inside those businesses. 5) Anyone who would have invested would have had to sign the normal disclosures about how they could lose all their money.
I guess we'll see what happens.