The show is gonna maybe turn into this Ocarina of Time shyt where instead of there being current time and flash forwards/back - there will be on the island or off the island - they wont be able to talk directly, but can do things that effect each others time...
Ben Linus will still remain control of the main island powers and leap in and out of the islands time and the real worlds time like fucking "Quantum Leap".
What I love about LOST is that they TAKE ALL THE RISKS - AND THEY MAKE IT TURN OUT GOOD.