Last season, one of the most hyped events on The CW was the crossover between "Arrow" and "The Flash." And while fans responded positively to seeing the DC Comics superheroes visit each others' stomping grounds, the crossover was in name only, as each presented a one-and-done story rather than a 2-part story.

In an interview with Deadline, "Arrow" EP Marc Guggenheim says that this season's meeting between Barry Allen and Oliver Queen is a different beast. Not only is it a crossover in every sense of the word, the 2-part tale will be a massive one.

"This is a big two-part event, one single bad guy, and it will very clearly launch 'Legends Of Tomorrow,'" Guggenheim told Deadline. "But at the same time what I think is a lot of fun about it is that it doesn't feel like a backdoor pilot for 'Legends Of Tomorrow.' It feels like an episode of 'Flash' and then an episode of 'Arrow.' It truly is a 2-hour 'Flash'/'Arrow' event that just so happens to introduce us to some new characters who will be a big part of 'Legends Of Tomorrow.'"