Are there other examples of companies that have successfully implemented the practice of extensive research before a major purchase, similar to Disney's approach to the Marvel purchase?

Yes, there are several examples of companies that have successfully implemented the practice of extensive research before a major purchase. One such example is Microsoft's acquisition of LinkedIn. Microsoft conducted thorough research and analysis to understand LinkedIn's business model, user base, and potential for growth before making the purchase. Another example is Amazon's acquisition of Whole Foods. Amazon conducted extensive research to understand the grocery market, Whole Foods' customer base, and the potential synergies between the two companies before making the acquisition.