Comic improvisation has matured well beyond the simple montage. Ensembles are inventing structures and themes to better engage performers and audiences. The latest is a Texas import called Ka-Baam! — a comic book come to life — in the hands of HUGE Theater. Step into opening night at Bryant-Lake Bowl, where you’ll meet audience-suggested superheroes Pomegranate Avenger, Guitar Hero and Purple Prince (for the Purple Guy) and their arch nemesis Zombie Queen. Meet (or suggest) all new heroes and villains 7 pm every Thursday in January.