From the above image we can see that there is front LED flash for the selfie camera above the display with Moto branding. Below the display we have an home button which might have fingerprint sensor.
The next pic shows the metal back and will have circular camera layout which we saw on Moto G5 & Moto G5 Plus. There are antenna lines running on top and bottom of the rear panel.Below the phone there is speaker grill and on top an 3.5mm headphone jack. And the last image shows us the removable back panel and with an user replaceable battery. As per rumors suggest that Moto E4 Plus might come with 5000 mAh battery.we can even see the SIM card slot and MicroSD card slot which is above the battery compartment which tells us that it might have user replaceable battery.
Moto E4 & E4 Plus will be powered by Mediatek MT6737M chip with 2GB & 3GB RAM. There will be 16GB internal storage which can be further expanded using MicroSd card.It will have 13MP camera at the back and 8 MP selfie camera with an LED Flash on both the side.It will run Android 7.1 out of the box.
We have to wait for Lenovo owned Motorola to announce the device soon.