If only

I'm sure most of us are aware that through the many different movies Godzilla has been in there are ideas that have been taken out or switched around for various reasons such as cost, popularity, ect to give us the final products we know and love today. So my question is if you could change 1 of the movies closer to it original concept idea, or see a godzilla movie that had plans to be made but never was what would that be? For me I'd love to see the original GMK movie with varan and anguirus. I think the plot would have worked better, and I personally would like the movie so much better to see these 2 lesser known godzilla monsters than 2 badly created versions of his popular foes. I'd also love to see the original Godzilla vs spacegodzilla that had mechagodzilla in it instead of moguera. All though this goes against my other point with more diverse monsters over the standard main enemy to have all the godzillas in 1 movie would be too good to pass up.