And the Arrowverse will indeed never be the same.

This yearsfive-part crossover Crisis on Infinite Earthsthrewa lotviewers:Oliver Queens two deaths; Beebo!

So EW hopped on the phone with crossover executive producer Marc Guggenheim to get some answers.

Legends of Tomorrow; Marc Guggenheim

Colin Bentley/The CW; Inset: Phillip Faraone/Getty Images

ENTERTAINMENT WEEKLY: Youtweetedthat DC Entertainment CCO/Publisher Jim Lee played a pivotal role in pulling offthe Ezra Miller cameo.

How did he help it all come together?

Basically, I was really working hand-in-hand with Jim.

Crisis on Infinite Earths: Part Five

So, we really worked hand-in-hand.

He was a cheerleader when he needed to be, a diplomat when he needed to be.

He really stepped up in every way one could do it.

His enthusiasm really helped make this possible.

TheCrisiscomic destroyed the multiverse and condensed everything into a single Earth.

Here, though, you guys decided to reboot the entire multiverse.

I promised that I would put all of the toys back in the toy box once we were finished.

TheLegendshour establishes that theDC Universe showStargirltakes place on Earth-2 in the new multiverse.

Thats really, really exciting for all of us.

Arrows next episode istheGreen Arrow & The Canariesbackdoor pilot.

I will say that this universe restart affects the entire universe, which includes the future.

I will also say the backdoor pilot gives you a very clear answer to that question.

Psycho Pirate was one of those characters that was in and out, and in and out.

So far this morning Ive seen some mixed reaction to theArrowhour.

That was really important to us that we look backwards before Olivers death.

You couldve placed Kate, who is relatively new, in a number of places.

Lets show Oliver and Ray really not liking each other.

Its fun to illustrate how far everyone has come right before you kill off Oliver.