The fact that one of the loading screen texts is referring to the mortals who became gods by a bargain with Jergel does lend to the theory that the absolute may be trying similar.
I guess it refers to the dead three. Myrkul, Bhaal and Bane. Jergal got tired of being a god and handed over his responsibilities to them. They later became mortal again (see the story of BG1 and BG2) and were murdered. They rose to godhood again later, more or less.
i suspect the skeleton at the ruins might actually be Jergal himself.
