Amazon has not released an official statement, but I believe that parts of today's press release is a response - in an off-hand sort of way - to that lawsuit. Look at the mentions of the third-party sellers, and all the times they are quoted. That is Amazon's response.
One key detail in the M-Edge lawsuit is the claim that Amazon pressured M-Edge into agreeing to a new contract. M-Edge was acting as a third-party seller on Amazon.com, and the new contract gave M-Edge less money and Amazon a larger cut of the retail price.
See, Amazon couldn't respond directly to the lawsuit, so instead they set about changing the mindset of the press and the public. Today's press release is designed to counter the idea that Amazon cheated a third-party seller. That's why Amazon mentions several other third-party sellers who had a good season.
TBH, I don't know this for a fact, but I don't see another reason to mention third-party sellers. I'm not sure Amazon has ever done that before, not in their major announcements. I'm not going to get into a discussion on what this means; I'm not sure if it's a confession, rebuttal, or merely damage control. I just wanted to express admiration for whoever thought this up.
But this clearly is a response, and the fact that Amazon took the time indicates that they are at least a little worried about the lawsuit.
image by Scottish Government