Apple is holding a big event on Monday — here's everything it's expected to announce

Apple is holding an event at Steve Jobs Theater on March 25 where it's expected to introduce new services focusing on video streaming and news subscriptions.Growing its services business is critical for Apple as iPhone sales have been slowing.Though Apple is likely to announce its video service this month, the service is not expected to launch until the spring.Apple made headlines recently when it sent out media invites to a March 25 event where it's widely expected to unveil its long-rumored video service and a news-subscription platform.An expansion of digital services is critical as Apple looks to boost revenue in other business areas to counteract slowing iPhone sales. The company said in its earnings report from January that iPhone sales had plummeted by 15% during the holiday quarter, and only about 16% of iPhones in use are expected to be upgraded to new models this year, according to a note from the Bernstein analyst Toni Sacconaghi published last month.So as we gear up for Apple's next big event, here's a look at everything we're expecting the company to announce.