After last year's hit of a crossover between Arrow and The Flash, fans have been waiting patiently for the next one to come around, and it looks like their patience is being greatly rewarded. Executive producer Marc Guggenheim tweeted the above photo earlier today, revealing the lineup of heroes for the crossover in three weeks. It includes Green Arrow, Speedy, Diggle, and Black Canary from Arrow, Flash from The Flash, and Hawkgirl and Hawkman from Legends of Tomorrow. Because of the shot being in the iconic style of putting all heroes together it is doubtful that other heroes will be in it, but not impossible. Seeing as the crossover is not including Legends, it can be assumed that the Hawk duo will be making their debut costumed appearances on The Flash.