I always do enjoy reading up and discussing possible ties, sticky legal matters, and presidential politics, but this year, it's basically Hillary in the bag. I don't even think you'll see Karl Rove have any hope for the GOP on election day.
With Trump ceding his election office in VA, this will require a Trump win to be a full sweep of all the currently polling swing states of IA, OH, NC, NH, FL, NV, and AZ. Clinton only needs 1. Whether Trump steps down before, after, during, nothing that distracting will happen this election because his odds of even winning are <10% in my opinion. I doubt even a lawsuit would attract that much attention outside of the 24-hour news sites.
My guess is that by the end of the month, Real Clear Politics will be showing enough lean Hillary states to hand her the win and by that point, no replacement of Trump will have any chance of winning.