While it's clearly not as superlative as its famous predecessor, it's simply because of both Heath Ledger's outstanding and Oscar-winning performance, and the character of the Joker's etching in our collective unconscious as the greatest comic-book villain ever created (with Lex Luthor a very distant second place). This is still a masterwork, and is an excellent coda to the finest filmic trilogy ever made. As great as Christopher Nolan is as a director, and as fine a film as 'Interstellar' is, I really don't know if he'll ever be able to top his work here, on these three films. But I, for one, am certainly looking forward to finding out...
