Chose which time frame your in

I think it would be awesome if you could choose if you want your Minecraft world to be futuristic,modern or keep it the way it is. Adding more equipment like mechas and planets for futuristic. There would be laptops and vehicles etc for modern. It could bring in tameable soldiers so you have your own army(for modern and futuristic) and enemy aliens that try to take over (futuristic). It could also add in more boss fights.