(Image credit: Future)

We're hours away from Apple's "Surprise and Shine" event, and according to rumors, we'll be seeing two new Apple Watches drop today — the Apple Watch Series 12 and Apple Watch Ultra 4 — there's a lot to cover. So, let's focus on the flagship.As is often the case this time of year, leaks and "insider" reports are plentiful, ranging from believable to, well, not. With that in mind, here's everything we think we know about Apple's next flagship wearable, the Apple Watch Series 12, including whether or not it has a chance of making our Best Smartwatch list.Apple Watch 12: Rumors in briefPrice and launch: Expected to be revealed on September 9's "Surprise and shine" event; preorders will likely open on Saturday, with units shipping the following week; a price increase is possibleHealth and fitness: Support for wrist-based blood pressure readings is rumored but remains unlikely, but there are rumors Apple will update heart rate monitoring in the app; there are strong hints at an updated Health app focused on a Readiness score; Apple may also (finally) improve the strength training feature.Design and display: A more efficient LTPO display is possible; a fingerprint scanner for Touch ID is rumored but less likely; an upgraded ceramic case option is possibleAI features: The Series 12 is expected to support Apple's new Siri AI voice assistant; a personalized wellness concierge is also rumoredBattery life: A larger capacity battery is possible; the S12 processor could bring efficiency improvements, tooApple Watch 12: Price and launch predictions