I'm almost 100% sure it won't happen. Already, the amount of battery remaining in% is displayed and, as something new, the color changes at 50% to brown and at 20% to red.
But you can of course write to Parrot and suggest your desire and hope they listen.
I would have thought that remaining battery time would be impossible to implicate accurately. It is so dependant on how the Anafi is being flown, wind direction, etc.
A bar would be nice. In recent updates the font got small so it's difficult to see the numbers when your busy flying. I'd like to see the option to change font size.