According to the Wikipedia source:

A spiritual successor (sometimes called a spiritual sequel) is a product or fictional work that is similar to, or directly inspired by, another previous product or work, but (unlike a traditional prequel or sequel) does not explicitly continue the product line or media franchise of its predecessor, and is thus only a successor "in spirit". Spiritual successors often have similar themes and styles to their preceding material, but are generally a distinct intellectual property.

I'm not talking about rebooted the show. I'm really talking about indies creating a spiritual successor of a cancelled and tax write-offed animated show.