One day, I came across a tv spot for Captain Underpants The First Epic Movie from 2017. One of the ad's I watched, linked below, featured a song that I was intrigued by and wanted to find it. I've been stuck searching it for quite sometime. The most I could analyze in terms of lyrics are "We are heroes..." though I doubt if that's the actual title song. I apologize if the quality is low but this is what I could find. Take as much time as you need. I'm in no rush to find this song.
(start at 2:45).