Very little, actually. The Delaware Chancery Court is arguably the US's most efficient judicial institution. They don't mess around.

I wouldn't be surprised if it's concluded by EOY. If Elon wanted to drag it out he'd have waited the full 6mo review period before making his intent official, and Twitter clearly wants it done with.

The only way I see this dragging out is if shareholder lawsuits from Elon's filing "mistakes" or SEC actions (for any of a dozen good reasons when Elon's involved) muddy the waters.