Spinoff

noun

1. An offshoot.
2. An incidental benefit or unexpected pay-off.

   "Space research often provides a spin-off for everyday technology."

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.

   ""Frasier" was a spin-off from the sitcom "Cheers"."

5. The formation of a subsidiary company that continues the operations of part of the parent company; the company so formed.