While at Kansas City's Planet Comicon, Stephen Amell said some big "fundamental changes" are coming to the CW's hit television series Arrow.

After Amell said Oliver Queen would be on the sidelines for part of this season the crowd began to murmur. "There's big things happening with the show," Amell added. "Very, very big things. And without spoiling anything, I would say this, I think the greatest moment in the history of the show will be the trailer we show at Comic-Con next year. I really do. Because, after three seasons and sixty-nine episodes we are going to fundamentally change the change at the grassroots level. And, I think it's going to cool."

Listen to Amell's comments in the video below.

Arrow returns with all new episodes Wednesday at 8/7c!