Some sequels force us to re-examine what made us like the original film. “Kick-Ass 2” has that effect, because it shares many surface qualities with its predecessor but offers none of its impact. “Kick-Ass,” Matthew Vaughn’s raucous 2010 adaptation of Mark Millar’s heralded comic, abounds with perverse joy and unruly energy.
'Kick-Ass 2' lacks moral punch