Arrow Season 3 Spoilers: Marc Guggeheim Teases Flash Crossover

The CW's Arrow and its spinoff, The Flash, will have their first true crossover event later this year. Executive producer Marc Guggenheim teased the episodes on a conference call and was as excited about it as many of the fans are.

"It's so freakin' awesome! It really is. I've never had so much fun writing a script before, maybe in my life. It was such a blast to work on," Guggenheim said (via Collider). "We're filming the Arrow episode right now, and it's just so much fun. I keep telling everyone that we should try for Avengers. It's these two heroes together with a big production value. We're blowing out the doors on this.

"There's the opportunity for inside jokes, and seeing all of the characters together. What happens when Cisco gets his eyes on Thea? There are moments like that, that you just can't do in a normal episode. It's just so much fun. It's really going to be a blast. Jesse Warren is directing it, and he is just crushing it. Those dailies are really, really insane. Nick Tarabay plays Boomerang/Digger Harkness, and he's amazing. And that weapon is a whole new visual language in the show, and a whole new visual language for our stunt guys to work with. And watching Grant [Gustin] and Stephen [Amell] together is just magic."

But Guggenheim wasn't done there, as he also addressed the persistent rumors about H.I.V.E. Deadshot hinted that the organization hired him to kill Diggle's brother, but Guggenheim advised fans not to hold their breath on this topic for now.

"There are no plans, at the moment. I know the fans have been waiting for it, ever since we teased it at the end of 206," he said. "It keeps coming up in the writers' room. Like everything else, it will have its day and its time. At the moment, I can't say that we've got the episode where we pick that thread back up, but it's definitely on our list of things that we want to get to."

Finally, Guggenheim talked about Roy's role as Arsenal in Season 3. "I think he's fine being a part of the team, as he is," he said. "We played with that notion of Roy questioning Oliver's judgement in Episode 218. What you see in Season 3 is a much more mentor/mentee, master/apprentice relationship, which is what we were setting up in 212, but didn't fully realize. It's really more fully realized in Season 3. You really see how Oliver is training this kid to be a hero in his own right."

What do you make of Guggenheim's remarks? Let us know in the comments section.