I guess this story will be forever unfinished, but that's both a good thing and a bad thing. Parts of it were very hot, and other parts were rather disturbing (to me - I'm sure the distinction doesn't exist for some). Imagine this storyline as an actual sequel to Hush...
I read a LOT of fanfiction, and this was singlehandedly the greatest fanfiction I have ever come across. Excellent work.
I don't know if you are still alive, but I have a suggestion for continuation for you
Superman is about to kill Ivy, but at the last second batman is stopping him with kryptonite, he can't let his friend break his code and kill, while superman is weak and Ivy is unconcious Bats decide to take Ivy to arkham for custody, and call the league to help superman.
on their way to Arkham , Ivy wakes up and starts to take over bats, she enslave batman and take over his cave, while ordering him to kill even Alfred.
while metropolis starts to recover from Ivy's last terror attack in Gotham , Ivy rise again to queenhood with her new billionaire toy boy Bruce wayne under her heel. But gotham is not enough. She wants all , she wants to retake superman and all the justice league.
Keep up the great work