A Spinoff, Spin-off

1. An offshoot.
2. An incidental benefit or unexpected pay-off.
3. By-product.
4. A fictional work where the protagonist was introduced in a preceding work or at least shares the same setting, often in a different aspect.
5. The formation of a subsidiary company that continues the operations of part of the parent company; the company so formed. Synonym: hive-off

Synonyms

• derivate
• descendant