My prediction is: The sacred name will be Android the Mustard Minion and the greatest new feature will be "Your smartphone can monitoring and tracking your health and fitness while you are on the go."
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Just as it's done in years past, Google will unveil the latest version of Android at its annual I/O developer conference. The company hasn't officially come out and confirmed this directly, but a session description that briefly appeared as part of the I/O schedule made specific mention of "Android M." (The session in question has now been removed from Google's I/O website.) When it was announced in 2014, Android 5.0 was first known as "Android L" before Google revealed its final "Lollipop" name months later. And while that version has so far made it to just 10 percent of all Android devices, Google isn't slowing down any in pushing the operating system forward.

Sadly the I/O session descriptions don't offer too many details on what to expect; the "Android at Work" session only says Android M "brings power of Android to all kinds of workplaces." Google has already started putting Android everywhere it can; it's on phones, tablets, in cars, powering TVs, and even running on Chrome OS. Now it sounds like there'll be a greater focus on making Android a force in the enterprise — and Google obviously needs developers to play a role in that.


Improved notifications and more powerful voice controls could be coming in Android M.

Source: http://www.theverge.com/2015/5/6/8560933/google-android-m-coming-may-28