Honestly, zero people at Arsenal are worried about any City 'legal cases'. If it makes you feel better to think you've opened a can of worms then all power to you, but I think you should focus more on City winning the current ongoing case rather than any token changes that come about from the APT case as genuinely I think you'll be disappointed at how trivial these changes are likely to be.
Whether it's fair or not, the PL runs to look after the interest of its members, a majority vote system is in place and basically turkeys don't vote for Xmas.