In the possible/alternate future timeline of the Mutant Apocalypse arc, Ice Cream Kitty has survived the harsh environment.
History
In The Impossible Desert, she defends Michelangelo's home with a large machine gun.
In Carmageddon!, Ice Cream Kitty is sadly melting away. Luckily, Mikey saved her just in time by scooping her into her cooler. Later, when the Turtles were racing to Oasis, Ice Cream Kitty shot down some Synthezoids with her cannon. The Turtles, Chompy, Kitty, and Mira