New use for giants?

I was looking at the different type of caves in the caves and cliffs update. I thought about how the big the noise caves are and how they would be perfect for spawning giants zombies. Right now giant zombies cannot spawn naturally. 

It would take a lot of fine tuning because the giant zombies hitbox is all messed up, but it is possible. I think it would be great fan service for all of those who wished to fight and kill the giant zombie in their survive game.

It doesn’t have to be the giant zombie. Mojang could create a new boss/mob. I think as long as it is giant people will be happy.