While we've had early looks at Android Nougat for months, it appears Google may be saving other software tweaks for its next Nexus devices. Android Police has screenshots that it says show "in progress" evidence of the new software, with a replacement for the Google Search bar widget at the top, a new way to open up the app drawer and space for potentially revamped navigation buttons.
As some commenters mention, the slide-up app drawer shown in the pictures brings to mind the Android experience of we started with on the T-Mobile G1. Up top, the slide-out G button for searching and calendar widget look well-positioned for a focus on the new Google Assistant AI. As the calendar keeps turning, we're getting closer and closer to seeing the new Nexus lineup, but even these leaks could change by then -- stay tuned.