1. Go to above $54, in which case musk profits and he can try again later (headwinds are strong in tech generally right now)
2. Go between $39 and $54 in which musk profits
3. Drop under $39 in which musk can further solidify his stake, for much cheaper than his takeover offer.
There’s basically no scenario in which musk loses assuming he’s serious and is willing to play the long game. Musk will either make a lot of money, or own Twitter.
I mean maybe he still acquires Twitter but that could be in 20 years after it's been run into the ground.
In practice the board will do what management thinks best. The various directors probably have legal duties as fiduciaries and will want to act in a manner such that they can demonstrate they performed those duties in good faith, but they will have enormous latitude so long as they observe certain forms.
There are likely procedures by which someone can force a shareholder vote on a proposal, but Musk isn't using them here. These are probably structured by the company bylaws.
The board doesn't have that power. If a majority of shareholders do not want to sell, they'll just replace the board if it tried such a thing.
In this case, the top 10 shareholders are almost 50% of the shareholders all by themselves, so this really comes down to what they decide to do.
This takeover is aimed at people that wouldn’t ordinarily sell their stock at this point in time.