Several members of the DC-CW family of shows ranging from Arrow, The Flash, Supergirl and DC's Legends of Tomorrow appeared on a panel at the annual PaleyFest this past weekend, hinting at some big things - and one big change.
Arrow co-showrunner Marc Guggenheim (and overall executive producer of the DC-CW shows) said that a "surprise crossover moment" with a special cameo in March 28th's episode of DC's Legends of Tomorrow.
“I will call it a surprise crossover. No one knows this because we’ve kept it under wraps, but there’s a surprise cameo, surprise crossover moment in the penultimate episode of Legends,” Guggenheim told Deadline.
Guggenheim also teased something that's "more than an easter egg" in that episode, with some unspecified ties to cartoons.
“I will say there is an easter egg - it’s more than an easter egg, it’s a little bit more obvious than that … that I think fans are really going to love it,” said Guggenheim. “And not necessarily fans of comics, but let’s say fans of cartoons.”
From cartoons to prose novels, Legends showrunner Phil Klemmer added that the author of "the greatest, I guess you could call it 'fantasy novel series' of all time will appear. You can figure out who that is." While the designee of that is debatable, a fictional George Lucas previously appeared in the series.
In Legends' season finale the following week, Arrow's Katie Cassidy will also return to the CW-verse.
Lastly, The Flash showrunner Andrew Kreisberg confirmed that his series is breaking the mold of having a speedster as the overarching big bad of each season with this fall's fourth season.
"Next season, we're not going to have a speedster as the main bad guy," Kreisberg revealed according to The Hollywood Reporter. Season 1 featured Tom Cavanagh/Matt Letscher as Reverse-Flash; season 2 had Teddy Sears' Zoom; and Andre Triccoteux appears in the current season as Savitar.
"With Savitar, we know who he is, and we've been planning this for a while," said Kreisberg. "The first two seasons were about having fun with his powers, and this season for Barry [Gustin] is really about the pitfalls of having powers, and that's the story we wanted to tell. That's why Savitar was the perfect villain for that story."