The shissar are not the shadowed men as a matter of fact I think the things we call shadowed men are not shadowed men at all...
Let me explain, in EQ1 "shadowed men" were invisible humanoids while the lore primer in EQ2 states that they evolved from their previous form to the swirling masses we see today I think it is wrong in this assumption. In the passage I posted from the remembrances series I feel clearly shows where these impostors we call shadowed men came from additionally the passage refers to the true limed ones. These true limed ones are in fact the invisible shadowed men we knew from EQ1 and as a matter of fact have returned to our world of EQ2 in the OoB. As such the things we called shadowed men from the OoLS were these tainted energy orb beings that grew dark, sprouted limbs in their upper hemisphere and search the worlds in a effort to infiltrate and spread the gift of unlight.
Asside from this have we discovered much in the OoB that links back into the Everling story? I only ask because the OoLS plays a large role in the Everling story and if this saga is to continue it would seem logical that the OoB would be a great place for it to continue onto.