What kinds of marketing research could you conduct to determine if this spin-off or expanded product offering may be successful in the marketplace?

Think about a product you like and use on a regular basis and the company that makes the product.
What kinds of spin-off products might this company consider producing?

What kinds of marketing research could you conduct to determine if this spin-off or expanded product offering may be successful in the marketplace?

What can you do to ensure that the answers you get from your market research assessments are accurate for guiding your decision?