Arnie is correct. King Arthur and his court are notoriously close mouthed about what they are or aren't planning. While many of us "suspect" that there will be a sequel to FT; PT and (hopefully) a VV4, it remains pure speculation on our part.

None of us has yet figured out exactly what spell; bribe or trickery will unseal their lips. That DOESN'T mean we won't keep searching!