Complex sentence: In "The New 52" (a reboot of the DC Comics universe), Jericho had his entire origins changed where he and his mother were believed to have died when North Koreans attacked their home.
Split into simpler sentences: In "The New 52" (a reboot of the DC Comics universe), Jericho had his entire origin story changed. He and his mother were believed to have died when North Koreans attacked their home.