It would be great to finally see this happening. There was talk last year of a new operator flying to Luton, Birmingham and Bristol using either Islanders or Trislanders from Bembridge I think but it never worked out.
However, surely Bembridge would be a better choice of airport than Sandown. I mean it has pretty much all the infrastructure in place, a simple but modern terminal, a hard runway, lighting etc.
If and when this does happen I'm sure I'll be using the service!