Spongebob and Sandy become a couple. Patrick and Mindy become a couple. Spongebob and Sandy admit their feelings. Plankton goes to Plan Z.2. Mr. Krabs does not talk about money. Squidward is finally not a loser. Spongebob decides to spare Squidward's life. Gary and Snellie become a couple. Pearl would appear and would teach Mr. Krabs a lesson. Plankton officialy goes to jail and Mr. Krabs goes two places at once, now that he is in-charge of the Chum Bucket(my thought). Mr. Krabs feels sorry for Plankton and decides to spare his life. Spongebob gets his license(NOT!), he becomes Mrs.Puff's dimwitted apprentice on fixing boats. And some special Teenick guest stars.

All that in one big finale.

Mine would be like this:

An ordinary day for SpongeBob as he goes to work at the Krusty Krab, and hangs out with his friends. His day is all good until a bigger force- even bigger than Plankton- a tsunami is heading for Bikni Bottom, and SpongeBob, Patrick, Squidward, Sandy, Mr. Krabs, Gary, Plankton, and Mrs. Puff help to save the town and stop the tsunami. During their adventure, they all admit things and share things they would never say, including Squidward admitting that he is jealous of SpongeBob, Sandy admitting her love for SpongeBob, and Plankton finally becoming nice and SpongeBob getting his liscense. When they stop the tsunami, Princess Mindy comes and thanks them all, and asks Patrick out.

That would be the perfect ending.

^I actually agree with SpongeSebastian. We've seen SpongeBob on the big screen once, and plus, who knows, a sequel may be a disappointment.

i don't really have a big plot, but it should definately be something that makes everyone in town, even squidward, appreciate spongebob. could you imagine squidward saying this to spongebob...

squidward-ya know, you're actually a pretty nice guy, you're the only one who ever believed in me, and you're a great friend