Google has outlined the potential costs and implications of allowing third-party app stores, such as the Epic Games Store, to operate within the Google Play Store. The integration would require 12 to 18 months and cost between $60 million to $137 million. Google emphasizes that financial costs are not the only concern, citing risks to user safety and its reputation. Epic Games will have the opportunity to challenge Google's estimates, with a final court hearing scheduled for August 14.