Thirteen years ago, Bryan Singer brought superheroes back to the Hollywood mainstream with X-Men. Ten years later, Matthew Vaughn and Jane Goldman reinvented the genre with swearily subversive thrillride Kick-Ass. Can Jeff ‘Cry_Wolf’ Wadlow’s sequel maintain the sheer joy of the original? Alas, Kick-Ass 2 is demoted to, at best, prodding buttock. A predictable disappointment.…