Personally, I'm suspecting that Roy will come in just in time to prevent the cops from offing disguised Elan, and will insist on a trial- which will take time to set up, which OotS will have to stick around for, ...which will give Xykon more than enough time to utterly annihilate Azure City with his invasion and show how right the Oracle's prophecies were/are.
Having Haley lose her speech impediment during the trial, for testifying on Elan's behalf or something, seems an obvious move to make (not to mention a welcome plot point since I, like so many others, am pretty tired of the joke by now).