The conclusion of last issue has Batman goading a Poison Ivy controlled Superman to hitting Batman so hard that he nearly died. Ivy says that since she controls the entire world she was able to use a combination of Science and Magic to piece Bruce back together.
This is a different Poison Ivy in the “Rebirth Universe” by the way. She is more of a fragile victim than an eco-terrorist bent on taking control of the planet for the Green. Batman uses this to appeal to her as a victim. She was forced to take sides in the war of Jokes and Riddles.Details
Catwoman is keeping Ivy company as Batman is convalescing in a hospital with Superman as a guard, under the watchful eye of Dr. Harley Quinn ( a Traumatic Brain Injury specialist). Hmmm almost like he planned this.