In an unconventional move, Google actually announced its developer preview for its Android N operating system update in March instead of at I/O this year, but we'll still likely get some details about features in the freshest developer version.
A reminder: We already know that Android N introduces quick reply messages, split-screen multitasking, better battery life, and new emoji. We could find out when it will ship and, in keeping with tradition, which sweet treat Google will name the software system after (past versions of Android include Marshmallow, Lollipop and KitKat). I'm personally hoping for Nutella.