If you've never seen the paperwork filed by parties in a lawsuit then the filing is worth a read. The original complaint filed by HC is interspersed with responses from Open Road. I learned a couple different procedural details.
But I'm not sure the case itself is worth paying attention to; this won't be some precedent setting decision.
It seems to be an open and shut case because HC does indeed appear to have the ebook rights. The original contract is written rather broadly, but it is also specific. HarperCollins' book rights cover “computer, computer-stored, mechanical or other electronic means now known or hereafter invented.”
Whoever wrote that contract was unusually prescient, I must say. Looking at it now, wouldn't you agree that it covers ebook rights?