All of this is just a theatrical farce by business guys. The market went down, Elon doesn't want to pay, Twitter has a pretty good negotiating position, the parties will settle out of court for $3-5 billion.
I'd naively assume that the price to settle starts at $12 billion dollars, and maybe goes up rather than down -- right now that $42 stock price is at least anchored by the probability of Musk being forced to buy it at $54, so if this ends without a sale, we might expect the stock price to go down.
You also have to factor in almost every other social media company is down 50% YTD. If the deal falls through, the market will price TWTR like how they did to facebook which shaves off another ~$15B off their market cap.
So TWTR actually stands to gain ~$27B in value.