They can also be heroes. Just for at some point. We listen positive characters making a song the refrain to David Bowie’s vintage art-rock masterpiece greater than as soon as and we get the “we can be heroes” message during writer-director Robert Rodriguez’s breezy, candy-colored, kid-friendly and cheerfully odd “We Can Be Heroes,” a stand-alone sequel to Rodriguez’ similarly loony and upbeat “The Adventures of Sharkboy and Lavagirl in 3-D” from 2005. ‘We Can Be Heroes’: three out of four CST_ CST_