You might need to make another playthrough in Saints Row IV. Kinzie wouldn't even need to recreate Earth again, since she wouldn't need to. What it is, is a matter of whether that they want to save Earth or not. I won't spoil you with anything, incase you haven't actually finished Saints Row IV and only heard about how it ends. It'll literally explain to you about how the sequel (possibly won't be one, considering the Volition making their statement clear about this game making the end of series) could literally go down.
Also, I literally think Kinzie wouldn't be able to recreate Earth since, that would take a lot of knowledge and that would be playing God and other aliens would demand the same thing of her, which would take a while since Earth wasn't the only victim of Zinyak. There just isn't a reset button for real life. Well... maybe for Saints Row.
Another note: you might've skipped finishing all the loyalty missions, because that would mean you literally didn't get the canon ending to the game and a small bit of information would've never been explained to The Boss and the Saints.
Though these ideas would be nice and everything, it just wouldn't go down that way.