Marvel Bunch May 5, 2019May 5, 2019 David Rall The cast of Avengers: Infinity War sing their own version of “The Brady Bunch” theme song, “The Marvel Bunch.” Share this:Click to share on Twitter (Opens in new window)Click to share on Facebook (Opens in new window)Click to print (Opens in new window)Click to email a link to a friend (Opens in new window)