Franklin Burroughs is a man that Abd al-Hazir, the lore specialist and adventurer met in the Tardein wastes (desert close to Caldeum) during his travels. He is described by Abd as a "grizzled, rough-hewn boulder of a man".
He is a specialist in killing Dune Threshers, but it is unknown if he will be come a NPC in Diablo III or not.