You mean Omar and Raj and Shawn? Yes
The character is black and he's revealed to be Xavier father who wants to tear down the creek.
He may have saved the creek from Xavier, but saving it from adults who want to tear down the creek will not be easy. It would be his greatest challenge yet.
Here's my story idea for the Craig of the Creek movie. You can read it on the link below.
https://www.wattpad.com/story/285608554-craig-of-the-creek-the-movie
I know they announced that it was going to be a backstory but my idea is similar to the Hey Arnold movie. The kids found out that their creek is going be torn down and be a huge shopping causing most of the creek kids to move away from each other. While all the other kids face the fact that their creek will be gone forever, it's up to Craig, Kelsey and J.P. to stop the bulldozers. To save their creek, they must go to the big city to find a document that can declare that the creek was an historical landmark that can never be torn that.
The main villain turns out to be Xavier's father and an old rivalry of Craig's dad. It turns out that Xavier was using his father to destroy the creek after Craig took away his kingdom.
That was my idea for the movie before they announced it.
I had an idea for the Craig of the Creek movie and its quite similar to the Hey Arnold The Movie. The main villain is Xavier father who is using his father to destroy the creek for him since he's a CEO of a company. It was all part of Xavier revenge plan for the Capture The Flag event. Xavier father is also an old rivalry of Craig dad and ex girlfriend of his mom.