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Will Arnett Tells Us What 'The Lego Batman Movie' Will Actually Be About

With reporting by Josh Horowitz

Everything in 2014 was certainly not awesome, but there's one thing that definitively was: The Lego Movie, MTV News's pick for the best of the year.

One of the many highlights of "Lego" was its Will Arnett–voiced Lego Batman, which is why we were thrilled to hear that the blockheaded Caped Crusader would be getting his own spin-off in 2017. And based on what we've heard from co-writers and directors Chris Miller and Phil Lord so far, The Lego Batman Movie sounds pretty darn, you know, awesome.

"Rest assured that every era of Batman filmmaking will be acknowledged," Miller told Empire back in November. “There have been so many interpretations of Batman and there is so much to play with there."

This comment piqued our curiosity regarding whether or not famous Batmen of years past -- like Adam West, Michael Keaton, Christian Bale, and, heck, even Ben Affleck -- would be making vocal cameos in the film. So we asked Lord, Miller, and Arnett when we caught up with them at the National Board of Review Awards red carpet.

"No spoilers," Lord teased. "But I will say I think the movie is really exciting because it's about ‘can Batman be happy?’"

We've certainly never seen a particularly happy Batman on the big or small screen before, which is something that Lord made sure to put in serious perspective.

"‘Wah, I'm so rich and handsome, and women like me, and I've got a Maclaren,’" Lord said, obviously mimicking the Dark Knight. "‘Something about my parents!’"

He's got a point. However, Lord also made sure to add that the movie won't only be about Batman's emotional journey -- there will also be some pretty insane action scenes.

"The action in it is incredible," he teased. "It's impressive."

Arnett, who has seen pieces of the film, concurred.

"The first bit that I've seen was mind-boggling."

The National Board of Review held their annual awards on January 6.