Musk may have lost round 1, but Musk has a HUGE pile of cash, and Open AI is a borrower from everybody and their brothers. Almost all the principle people left Open AI already.
In point of fact most valuations place OpenAI in the hundreds of billions of dollars already and growing rapidly.
Basically, no: OpenAI's pockets are deeper than Musks's personal wealth. Especially so considering that this suit is existentially important to them where Musk needs to maintain leverage for other efforts.
There won't be a round 2. It's over.
Perhaps he lacks good lawyers, perhaps he just can’t find substance and he’s filling out of spite.