How to Include Mecha-King Ghidorah in the MonsterVerse.

Everybody knows why he should be included,and this has so many reasons he is gonna be in GvK

Perhaps the severed head could be used for dna.

The severed head could have DNA samples extracted, and also be used for Mecha King Ghidorah. You know, since you only need a little blood for DNA... and it's microscopic... and they'll probably be able to replicate the DNA if they have robot Godzillas and cyborg Ghidorahs.

My idea is that by using electronic charges on the severed head, Ghidorah's regenerative abilities could be reactivated and try to regenerate its previous body. As it's only 1 of the 3 heads that are still intact and being powered, maybe only 33% of the body would actually regenerate which would leave room for some mechanical limbs.