Some small spoilers from an Access Hollywood article.
Michael Emerson said...
We'll meet brand new residents of the Island. (I'll reveal more on the new cast soon). Michael urges fans not to expect the expected from his kooky gang of dirty faces and ragged clothes. Heck he even hinted that they may even wear shoes back at home! Hmmmm... They are apparently nothing what we think they are! Maybe their attire is like the beard Mr. Friendly wears. A costume!Regarding Hurley...
He had just started shooting the first episode of the season, but as you can imagine, was tight lipped about what would happen other than Hurley would be informing the "Losties" back home about "the others" holding Doc Jack, Kate, and Sawyer captive.Source: Access Hollywood