The return of MLS to the Apple TV app is likely to have a positive impact on Apple's stock in the short term due to potential increased subscriber growth and higher engagement rates. As a major tech company, Apple's diversification into sports streaming aligns with its strategy to expand its services segment, which is a key revenue driver. The news is directly related to Apple's product offering and marketing efforts, hence the high relevance and importance. The confidence in this analysis is high due to Apple's strong track record in successfully leveraging content to drive service growth.