Honestly, it is all speculation, but if the other 4 Glazers want to sell, I find hard how this sale can get blocked.
The board of directors have 12 seats. In 6 of them are the Glazer siblings, then there is Arnold, the CFO, the general counsel and 3 independent seats. If this goes to a vote, the four Glazers who want to sell would need 3 other votes to vote for them. And I find it hard how the independent directors would vote against selling at 38$, which is a massive premium on the stock’s current value and three times as much as what it was worth before the Glazers wanted to sell.
After that vote, there would be a vote of the entire shareholders. With Glazer votes being 10 times more valuable than other votes, the 4 Glazers’s votes would have over 60% of the power. Assuming that everyone else votes to sell except Joel and Avram, the final voting would be around 70% to sell which would be enough if there is something in the club status that a full sale requires a supermajority.