Complex sentence: However, it never came to that as Night-Slayer was captured by Catwoman and Nocturna having been stabbed was last seen being put into a balloon by Jason Todd which he then set off into the air.
Split into simpler sentences: However, it never came to that, as Night-Slayer was captured by Catwoman. Nocturna, having been stabbed, was last seen being put into a balloon by Jason Todd which he then set off into the air.