Complex sentence: Mr. Miracle and Big Barda later joined the cast, with Mr. Miracle having just escaped from the villainous Darkseid and his relationship with Barda strained due to mutual mistrust due to Barda being a former member of the Female Furies.
Split into simpler sentences: Mr. Miracle and Big Barda later joined the cast, with Mr. Miracle having just escaped from the villainous Darkseid. His relationship with Barda was strained because of a mutual mistrust the as a result of Barda being a former member of the Female Furies.