[Reed]

Simply put.

For information about the Island perhaps?

What do they plan to do with Ben upon capturing him and does his capture and use have an "expiry date"?

From here I would imagine they need Ben to initiate the Protocol ["Torching" the Island] that Keamy and Daniel spoke of - though one would assume they ALREADY know how to do this through using that Dharma booklet.

Does anyone think Widmore will show up on the Island in the Finalé, as his comments in the Ben flashforward need not necessarily mean he does NOT arrive.