Complex sentence: After a fight with Impostor, posing as Rapture, Dragon proposes to Jennifer, and their wedding follows in the next issue, where Jennifer is apparently killed by the New Overlord--in truth she was replaced with Impostor beforehand by the Covenant of the Sword.
Split into simpler sentences: After a fight with Impostor, posing as Rapture, Dragon proposes to Jennifer, and their wedding follows in the next issue, in which Jennifer is apparently killed by the New Overlord. In truth, she was replaced with Impostor beforehand by the Covenant of the Sword.