Some exciting news in the world of Christopher Nolan's Tenet. This week, we've learned Warner Bros. will be releasing the long-awaited flick in select U.S. cities at the end of August and (and!) we've also learned Tenet will have an original song. I know it's been a long, winding road full of obstacles with Tenet, but I am thoroughly intrigued by these two big updates. [caption id="attachment_863684" align="alignright" width="360"] Image via Warner Bros.[/caption] First thing's first: Early access screening dates. Deadline reports that, as announced by Warner Bros. Domestic …