Prediction: These 2 Challenges Will Become Full-Blown Problems for McDonald's

For years the business model worked well, but its franchisee/franchisor relationships have seemingly become lopsided.There's no denying McDonald's (MCD 0.11%) is king of the fast-food industry. Not only has the company clearly mastered the art and science of quick-service restaurants, but with more than 42,000 stores each doing on the order of $3 million in sales per year, it's also the biggest name in the business. It's made for a rewarding long-term investment as well.No great company is guaranteed to thr ...