Was the ending with Freeze and Ivy in the same prison cell added on later in production. Makes me wonder if originally Ivy was supposed to die from being eaten by her plant when Batgirl kicks her onto it, but the producers didn’t want Batgirl to seem like a killer.
shareI think that scene was written more as a "Poison Ivy gets her just desserts" thing. It wouldn't have actually made sense for them to share a cell at all, considering Mr. Freeze's biological needs.
One of the few reasons I actually like this film was, Batman actually made peace with Mr. Freeze and gave him a way to help his wife peacefully instead of committing crimes and killing people for what he needed. Chances are, Mr. Freeze would have had his own climate-controlled cell at Arkham with a laboratory attached to house his wife and the equipment he needed for his research. Bruce [secretly] could provide the materials and funding Mr. Freeze needed, taking away the need for Mr. Freeze to have to do evil to try and help his wife.
To be fair, this film was actually much more lighthearted towards Mr. Freeze's story compared to the original DC comics. For one thing, they let Arnold develop the the character instead of following the comics version, and they made it so his wife was till alive and floating in stasis in a tank.
In the comics, she had been cryogenically frozen in secret, while Victor Fries stole money and resources from the company he was working for to do secret research on her disease (which was made up by the comic book writers). Eventually the CEO found out, and shut down Mr. Fries's work, literally, and ended up killing Victor's wife while she was still in stasis. So Mr. Freeze's motivation to do evil was so much worse in the comics and cartoon, because he wanted to avenge his wife's death. Batman foiled him trying to murder the CEO who killed Mrs. Fries, and had him sent to trial, but Mr. Freeze's thirst for revenge turned into a craze, and he would periodically break out of Arkham to cause trouble and freeze Gotham from time to time.