During a panel at Heroes & Villains Fan Fest this weekend, Arrow star David Ramsey, who plays John Diggle, once again touched on what has, to this point, been the biggest Diggle question of the season: how will he react when he learns that his son used to be a daughter before "Flashpoint" changed everything in the season premiere of The Flash?

"It's a great story point. You'll see Diggle's reaction to understanding that he once had a daughter in the big four-way crossover that I'm sure everyone here is looking forward to, and it's going to be more compassionate than you might think," Ramsey said, echoing what he told ComicBook.com back in October almost word-for-word. "Clearly, Diggle can't miss something that he's never had, and from his perspective, there's only been John, Jr. -- Sara never existed for him. He's not going to be angry. He's going to be much more concerned about Barry's misuse of his powers."

For those confused by all of this, here's the skinny: When Barry returned from an alternate timeline (one he had created by traveling to the past to save his mother from being murdered, and then eliminated by traveling back a second time to allow her murder to play out), it was revealed that John Diggle and Lyla Michaels's daughter Sara no longer existed, and was replaced by a son -- John, Jr.

With John already handling a mountain of personal trauma (most notably the fallout from choosing to kill his brother, a HIVE agent, last season), ComicBook.com spoke with Ramsey at the Arrow 100th episode party over the weekend, and asked him: how will Diggle handle the revelation?

"Much more compassionately than you might think," Ramsey told us. "Diggle can't miss anything he's never had and 'Flashpoint' changes history -- it changes his history directly -- so he never can really miss Baby Sara anymore, becuase he never had her, but he is concerned about Barry. Barry's actions were reckless, and with all that power, being reckless -- to someone as disciplined as Diggle -- comes as a shock."

That it comes during the crossover -- and so there are some pretty pressing things to deal with, including what looks like a captive or missing Oliver Queen at some point in the story -- means Diggle and Barry will likely have to deal with any questions between them on the fly, but the upside is that Barry might have an opportunity to prove himself to Diggle during the battle.

(Photo: The CW)

It's not likely to ingriate The Flash to Wild Dog, whose actor recently told us the antihero not a fan of metahumans.

“Wild Dog will be in the crossover, and he has a huge dislike for metahumans,” Gonzalez said. “So we’ll definitely see him not exactly rub well with The Flash and Supergirl and that’s just another glimpse into his psyche and his ideas and thinking about the world and the idea that there are people out there who have these sort of powers and who they are. Instead of saying ’Wow, these people can do these things,’ he says, ‘no, I don’t like you because this is what you bring to the table. This is what you represent to me.’”

The crossover will take place next week, giving Diggle and Wild Dog both an opportunity to come to grips with the Barry Allen of it all.

More Arrow news: Arrow's Stephen Amell Says Oliver Will Find Closure In 100th Episode / Arrow Cast Reveals Their Favorite Superheroes / David Ramsey On His New Helmet And Arrow's New Recruits / Expect More Speedy In Her Costume Coming Up In Arrow

Supergirl airs Mondays at 8 p.m. ET/PT; The Flash on Tuesdays at the same time; Arrow on Wednesdays and DC's Legends of Tomorrow on Thursdays. All four series air on The CW. The "Invasion!" crossover will air beginning November 28.