Go on then, predict what its all about :twisted: My prediction kind of happened but has passed already, here it is.
I predicted in about series 3 that final ending would centre around Desmond. I theorized that Ben would successfully kill Penny in revenge for Charles Widmore having Bens daughter killed on the island (Charles is Pennys father). Desmond (Pennys partner) would then travel back in time somehow as he did in the episode with Farraday. Once back in time Desmond would press the button in the hatch at the time the past him did not press it. Pressing the button prevents the release of energy that brought down oceanic flight 816. Therefore the plane never crash s so Lost in effect never happens. This would mean that Desmonds past self would probably never get to leave the island so it would be a kind of ultimate sacrifice. Penny lives as none of the events leading to her death take place but also Desmond never gets back to her.
This will not be the ending though for sure. Desmond is not down as a series regular in season 6 and Ben already tried unsuccessfully to kill Penny. So that my theory down the shoot, whats your?