Complex sentence: He then explains that Prankster is Loomis' son, and he plans to blow up city hall as revenge; he also sent Sonia the email about Zucco to make sure Nightwing got involved.
Split into simpler sentences: He then explains that Prankster is Loomis' son, and he plans to blow up city hall as revenge. The villain also sent Sonia the email about Zucco to make sure Nightwing got involved.