There's going to be an episode next week, but it's going to be a repeat of the "Three Kings" episode. Also, originally, "Brian's Got a Brand New Bag" was supposed to air this week, but was moved back to November (with tonight's episode, which was supposed to air next week, being moved to tonight). Two possible reasons for the schedule change:
1. With the annual Simpsons Halloween special airing next week, it's likely that Fox decided to schedule the "Three Kings" episodes for next week due to it being based on the works of Stephen King.
2. The episode that was originally scheduled for tonight was pushed back because a sub-plot involves the movie Roadhouse, and with Patrick Swayze dying in the past month, it may have been delayed as since it may be "too soon" to make a Patrick Swayze joke.