Looks like the sequel to the film of THE LAST STARFIGHTER will be THE NEXT STARFIGHTER.
imdb just identifies it as STARFIGHTER. But doing some google searches came up wiith:
"The Next Starfighter" - Sequel to the film "The Last Starfighter" which has secret members of the Kodan Armada trying to bring down the Frontier within the Rylan Senate. Louis Rogan is a full fledged Starfighter and is asked to help test the new prototype Gunstar named the Crimson Star. Xur is still alive and vows to destroy Starfighter Command, but Alex, Grig and Louis have to stop him.
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This sounds like an exciting approach to a follow-up. Also, I was wondering why we were getting more script inquiries about productions of the stage musical than we had been, and I guess this helps explain it.