WARNING: The following contains major spoilers for Teenage Mutant Ninja Turtles #113 by Kevin Eastman, Tom Waltz, Sophie Campbell, Ronda Pattison and Shawn Lee, on sale now.
Things in Mutant Town might not be great, but the new home of the Teenage Mutant Ninja Turtles has been looking up recently. The dojo is doing well, the community is coming together, and there is even talk of open elections taking place soon. However, the Turtles have just been warned of the bleak future ahead of them, thanks to the actions of one of their own
Shortly after the evening's training session finishes up at the dojo, the Turtles are shocked by the sudden appearance of Lita. The young mutant that they'd just finished teaching appeared before them, all grown up, having come back from a future worse than anything they've seen yet. Jennika is especially suspicious of all this and is shocked that the rest of the Turtles are so willing to accept their intruder's claims at nearly face value. Begrudgingly, Jenn accepts the situation as best she can, but she doesn't like what she hears about her role in dooming the Turtles' future.
While Lita has come back to prevent one horrible thing from happening, she's also made the journey to ensure that one good thing persists, specifically Jennika's musical pursuits. It might not sound like much, but Jennika leaving her passion behind makes her the first of the entire Splinter Clan to gradually forget how to enjoy life, the group becoming all consumed with the war effort. Jenn is outraged that her path in life is seemingly being forced upon her, but it gets much worse than that.
Lita explains that the death of Karai is the straw that breaks the camel's back so to speak, causing the Foot Clan to launch a direct assault on the Turtles' dojo that ultimately breaks up the family for good, and that they have to act now to rescue her from a horrific helicopter crash that has just taken place. Saving Karai from the wreckage isn't what Lita was worried about, though. Jennika murdering Karai in cold blood is the death that she has really traveled back in time to stop from happening.
Jennika spent years with the Foot Clan after forming a close friendship with one of its members in prison. After escaping incarceration, Jennika sought out the Foot and quickly became one of their greatest assets with a particular knack for assassinations. It took Splinter claiming leadership of the Foot Clan and then humbling her in combat for Jennika to even consider her proclivity for lethal force might have been wrong, and it took nearly being killed by Karai for her to end up where she is now.
The idea that she could still be that person somewhere deep inside herself is more upsetting to Jennika than anything else that Lita could have possibly said. Even if Jenn denies it, Lita seems certain that she is still a cold-blooded killer at her core, and it's only a matter of time before they find out exactly which of them is right.