Court cases/decisions don't fit well into existing schema but they are a hugely important topic.

Case law is part of the legal system in at least 40 countries including Australia, Bangladesh, Canada, India, Ireland, Israel, Nepal, New Zealand, Pakistan, the United Kingdom, and Uganda, so this standard wouldn't just be focused on U.S. law. A standard that were inclusive and generalized enough would probably cover the legal systems governing over 2 billion people.

Cases aren't Legislation, so it doesn't make sense to use that type of CreativeWork.

They are somewhat like Events in that they are decided on a particular day and each person involved is a contributor, but each person involved has a more specific role like petitioner, respondent, advocate, or judge/justice.

Look at how a typical U.S. Supreme Court case, Muller v. Oregon, is represented in three popular case databases, Oyez, Justia, and Cornell Law School. Oyez is the most structured, but that structure isn't represented in structured data at all, probably because there's not an adequate way of doing so right now.

How does one start to develop a standard like this? I am totally new helping out the structured data community, but I have worked with structured data in website projects for several years. The work I'm doing now lends itself to this, so I could consult with relevant experts (in the United States) to help along such a process.