According to The Animation Guild, it's been picked up! http://animationguildblog.blogspot.co.uk/2015/08/the-animated-productions-among-us.html
It's created by Aaron Springer (Mickey Mouse, SpongeBob) and is about Zak and Marsha who end up stuck in uncharted territory at the center of the earth with eccentric classmate Billy. - http://www.animationmagazine.net/tv/disney-announces-haunted-mansion-special-toon-pilots/
It's created by Aaron Springer (Mickey Mouse, SpongeBob) and is about Zak and Marsha who end up stuck in uncharted territory at the center of the earth with eccentric classmate Billy. - http://www.animationmagazine.net/tv/disney-announces-haunted-mansion-special-toon-pilots/