Ideas for Legendary Monsters

yo members! Came up with a few designs for the old toho roster if legendary make G14 into a franchise, share thoughts and critisims if you like!

Biollante:Splits into two more heads when the first is blown off (sorta like a hydra)
Mecha Godzilla: A Jaeger like monster, made by invading aliens to take over the race and was mainly made to destroy godzilla, same old, just with better CGI and BEEFIER, MUCH BEEFIER
Anguris and Rodan: Two giant monsters that survived the permian extinction; anguris is a gigantic ankylosaur and Rodan is a humoungas Pterranodon, both capable of beam attacks but like Goji, only used as a last ditch effort. They act sorta as godzilla's allies.
Gabbra: COMPLETE OVERHAUL, taller than the big G, electric attack is used in his fists for punches. Attacks cities power stations for sustenence. Looks less cat like and is given a crocodillian look.
Space Godzilla: Works with Mecha G, formed when aliens decided that Mecha G needed an ally, capable of insanely powerful beam attacks and uses psychic attacks mainly, extremely weak compared to big G
Megalon: A massive stag beetle (quadrapedel) that is awakend when godzilla stomps through the hawaiin jungle in G14. It's horns can stab thorugh gojiras hide, capable of letting off aromas that confuse Godzilla
Mothra: Works with Megalon (surpisingly!) and is more aggressive due to being territorial, larve form is sweet and quiet whereas adult form is an insane moth capable of creating hurricanes with her wings
Hedorah: A mysterious glob of sentient polluted earth capable of materialising itself into various structures, uses pollution as sustenence. Awakens when Fukashima happens and slowly drains it's energy. Capable of trapping big G in it's nest of polluted earth it forms as a home to breed other Hedorahs and slowly trapping it like a spider with an insect in it's web
Manda: A massive sea serpent that is capable of land travel via. Can spit acid and easily bursts through skyscrapers. It's made from a rocky type material and comes to the surface only to reek havoc upon the alpha species (humans). 
That's all I have for now! Just ask if you want more, I really want to hear what you guys think of these re designs.