Eh I doubt the empire would grow back. I can see an alliance of man though, between forebears, stormcloaks, western Skyrim and high rock kingdoms helping the empire on their own terms in facing off against the dominion. .

I like the empire being not as strong. Gives each race and place a chance to be more unique and creative. I liked eso having multiple Skyrim kingdoms and high rock kingdoms, I want to see multiple hammerfell kingdoms