Theyre all going to have their own continuing storylines, Berlanti assured the PopFest crowd.

It really does feel like, in the middle of the season, a three-hour movie.

During the mega-crossover,Arrowwill celebrate its landmark 100th episode, and Amell wouldnt have it any other way.

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Credit: Alberto E. Rodriguez/Getty Images for Entertainment Weekly

This ones just bigger, he said.

Almost everyone interacts with every other character at a certain point.

Arrowfans also have the arrival of Dolph Lundgren to look forward to.

The famed action star will soon debut as the flashback villain Kovar.

He brings a different energy to the show.

I mean, come on, he said.

Berlanti added, Obviously, they work together every week.

I cant imagine anyone that would ever be in either of their lives that would replace the other person.

Hes the god of motion, Berlanti added, so Flash is up against his biggest foe yet.

Gustin also touched on how Barry is dealing with turning the timeline upside down with Flashpoint.

Barrys got a lot of feelings.

Hes a sensitive guy.

He beats himself up, I think, quite a bit, he said.

As soon as he starts to realize what the repercussions are, it weighs on him heavily.

But Berlanti isnt going to turn back.

We like to grow ourselves and grow our characters.

Lotzs Sara is also navigating change as the new leader of the team onLegends of Tomorrow.

I think shes kind of naturally been backseat leader [already], the actress said.

But now that its actually her responsibility, I think its kind of stressful, because everythings your fault.

Shes kind of got to get her act together.

Benoist, naturally, thought Supergirl would reign supreme.

Shes got heat vision!

Amell wasnt having it.

Ill let you destroy each other and then Ill come in and mop up, he said.

ET, andDCs Legends of Tomorrowairs Thursdays at 8:00 p.m.

ET, all on the CW.

Watch the full CW Superheroes panel from EW PopFesthereon the PEOPLE/Entertainment Weekly connection (PEN).

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