How would you launch a new product recommendation carousel for Amazon?

Amazon is releasing a product recommendation carousel. Q1. How would we approach this launch with executive leadership? Q2. How would you obtain the data to find out if you should launch and what sample size should your testing batch be for an A/B test scenario? Q3. What category do you think is the largest revenue generator for Amazon? Q4. Then calculate how many people visit Amazon for that specific product within the US so you know your product launch was successful.