Worst case for Elon is he is out a billion for a company worth much much less than the $44B he was offering.
He may still go through with it, but at half the price.
And fire all of its management.
I wonder
If Elon has to pay the $1 billion breakup fee but then turns around and buys twitter fro $20 a share would be come out ahead.
Also if he then bought twitter could he refund himself the $1 billion?