Complex sentence: The Joker reveals their locations, and Batman goes to Rachel's, only to realize that the Joker has tricked him into finding Dent moments before both buildings explode, killing Rachel and scarring half of Dent's face.
Split into simpler sentences: The Joker reveals their locations, and Batman goes to Rachel's, only to realize that the Joker has given him Dent's location. Moments later, both buildings explode, killing Rachel and scarring half of Dent's face.