Nathan Fillion revealed a new photo today that shows him hanging out with his former Firefly co-stars Joss Whedon, Adam Baldwin, and Alan Tudyk, suggesting there is something "reuniting" going on. It appears they are clinging to a tree and mysteriously looking up at the sky.

Firefly Reunion in 2010?

Could there be a new Firefly project or a reunion of some sort in the works?

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