Thank you to Godzson, for pointing out two bits of news.
David Hasselhoff has a part as a lifeguard in the SpongeBob movie coming out next month... wow...
Also, it looks like SpongeBob Meets the Strangler & Pranks A Lot, an unaired pair of episodes, will be on Nick next monday after a SpongeBob marathon. If I'm not mistaken, that is the final unaired episode of the three year long Season 3. So, after the movie, there will be nothing new until Season 4 starts.