When a game that has already been shown in previous years is on the schedule again, it means that the run has changed significantly, that the run being showed is of a different category or that it is an event of sorts (blindfold, 2 players 1 controller, race, etc). I am not sure what the runs accepted / runs submitted ratio is, but I can tell you that, every time, a bunch of well known runners make solid propositions that get refused, so they seem to have a lot to chose from.
Anyway, I am curious to see the Batman race between EndySWE and dxtr. The theoretically possible sub 10 is more possible than ever thanks to some newly discovered pattern manipulation for the Joker and a new way to do one of the bosses. They recently traded the WR back and forth with EndySWE getting a 10:00 a few days ago. Who knows? Maybe we'll get a sub 10 in the race?