Complex sentence: In the 2009-10 miniseries', which retells the origins of Superman and his supporting cast, Metallo is Sgt. John Corben, who serves under Lois Lane's father, General Sam Lane.
Split into simpler sentences: In the 2009-10 miniseries', (which retells the origins of Superman and his supporting cast,) Metallo is Sgt. John Corben. He serves under Lois Lane's father, General Sam Lane.