Thanks to DarkUFO reader Andrew who was lucky enough to work as an extra on the set of Lost.
I worked as an extra on Lost for the 8th episode of the upcoming 4th season,and I can confirm that it is a Michael-centric episode that takes place between the time he left up until present time on the island. I was one of the extras in NY where Michael ends up and meets Tom. On the set there was a lot of talk about how Tom could be there and there were the theories of the Orchid going around.
Source: Andrew via DarkUFO