I don't think anyone will know until the TT is out of the way. The Classic TT is run by the same team that run the TT, and they're rather busy just now. The Manx Grand Prix is run by the Manx Motor Cycle Club, and is a different event to the Classic TT, although run concurrently.
However, I DO sympathise with Jimmy C. Folk need to book their sailings, organise machinery, accommodation, raise funds.
It ain't easy.