It's hard to square 'antitrust' with continued availability to use and ship stuff based on GPL core code, and continued right to fork and do their own development.

Trademark rights are real and separate from copyright, it's also hard to see the judge being impressed with posturing about it.

It all feels like a code of conduct situation, the project unilaterally decided they won't work with an individual any more and withdrew credentials for working together. WPE's position is Automattic just can't do that to them, perhaps doesn't have the right to cancel anyone, 'cos antitrust. I guess we will all find out.