Ok so Dexter realizes that he needs to triumph over someone of Joker's status, so he decides to take a trip to Gotham to settle this since Batman never will. With Dexter having 1 year of prep, and for the last month Joker knows someone is coming but he doesnt know who, could Dexter take him down? Could all of Dexter's forensics resources and knowledge and predator skills be enough to make Joker apart of his ultimate collection? Now remember Dexter has taken down some pretty impossible figures, (Russian assassins, Defense Attorneys, etc). I know Joker is, well, Joker, but I am also giving Dexter any files Batman has on Joker to help with his prep.
If Dexter can't complete this with the situation I have given, what would it take for Dexter to take Joker down?