Moto Z2 Play does not have hybrid sim slot but it has dedicated 2 sim card slots and 1 memory card slot.
Standard packaging includes Mobile Phone with in-built battery, FREE Style Mod, USB Type C Cable, USB Power Adapter, SIM Ejector Tool, User Manual and a pair of Headphone.
Yes, Moto Z2 Play comes with the inbuilt battery.
Yes, Moto Z2 Play 64GB comes with latest 7.1 Android OS so you may not require to update it immediately but going forward, company will produce OTA updates.
Yes, the phone supports dual 4G sim cards.