Dubuque Con, Iowa – Comic Book and Gaming Convention Leave a Comment / Blog / By Dennis Deevy Come Check out the Delorean Time Machine at the DBQ Con! Five Flags Event Center. Sept 30th / Oct 30th, 2017, in Dubuque Iowa. We’ll be right next to the entrance so be sure to get your selfies ready! Click here to go to the DBQ Site and See More!