“‘Rod Blagojevich Superstar!’ is Second City’s ripped-from-the-headlines, rushed-to-the-stage, ready-for-potential-touring parody. Combining the disgraced governor’s grandiosity with the musical flavors of ’70s rock operas like Andrew Lloyd Webber’s ‘Jesus Christ Superstar,’ the show probably has a limited audience of political junkies and a pretty short shelf life.” Or, given the prospect of a trial, maybe not so short.