The end of Arrow is nigh. The CW's longest-running DC Comics show officially set its series finale date for January 28, 2020, so all that's left to do is get in some last moments with Oliver Queen (Stephen Amell) and Co. (Plus, uh, that massive dimension-hopping event Crisis on Infinite Earths. There is also that.) Getting in on all the melancholy is Marc Guggenheim—one of Arrow's creators along with Greg Berlanti and Andrew Kreisberg—who shared notes from the original pitch that resulted in the series. [caption id="attachment_839144" align="alignright" width="360"] Image …