Another possibility is a power - hungry Capitol official who sees the TMNT as a threat to the order of the Hunger Games. This official could bend the rules and send in extra forces to take out the Turtles, all while trying to keep it a secret from the public so as not to disrupt the 'entertainment' value of the Games.
The Shredder would be a likely villain. He could see the Hunger Games as an opportunity to finally get rid of the TMNT. He might manipulate the other tributes or even work with the Capitol to set up traps for the Turtles.
Well, Kyle could be a strong contender. He's intelligent and has a strong sense of justice. He'd be able to strategize well and form good alliances. However, his temper might get in the way at times. Another possibility is Stan. He's fairly resourceful and has a good heart, which could help him gain allies, but he might be too hesitant to make tough decisions sometimes.
Elsa would be a strong contender. Her ice powers give her a huge advantage. She can defend herself easily and attack from a distance. Also, she has shown great self - control in difficult situations in her own story. But Anna also has a chance. Her determination and ability to make friends quickly could help her form strong alliances and survive.
Naruto. He has incredible stamina, his shadow clone jutsu gives him an edge in terms of numbers, and he has the willpower to never give up. He could use his clones to scout the area, set up traps, and then when it comes to a fight, his rasengan would be a very powerful offensive move.
Harry Potter himself might be a likely candidate. He has experience in facing life - threatening situations and has a strong sense of justice. His skills with a wand could give him an edge in combat and in finding resources. For instance, he could use the Patronus charm to keep away dangerous creatures in the arena.
It could be Annabeth. She's incredibly intelligent and a great strategist. In the Hunger Games, strategy is key. She could analyze the arena, figure out the best places to hide, the best times to strike, and form alliances that would benefit her in the long run. Her knowledge of architecture might also come in handy if there are any structures in the arena that she could use to her advantage.
Ra's al Ghul could be a great villain. He is always seeking power and immortality. In a crossover, he might see the potential in mutant genes to achieve his goals. His vast resources and knowledge would make him a formidable foe for both Wolverine and Batman. He could be plotting to use mutants in some grand scheme that would also impact Gotham, which would draw the attention of both heroes.
It could be Orochimaru. He is always interested in new forms of power and Corrin's unique abilities would attract his attention. He might try to capture Corrin to study her dragon powers and use them for his own evil purposes. Naruto would then have to protect Corrin from Orochimaru's clutches.
Percy Jackson himself would be a likely survivor. His powers over water, his combat skills, and his ability to think on his feet would give him an edge. Annabeth Chase would also be a strong contender. Her intelligence and strategic thinking would help her navigate the challenges. Also, Katniss Everdeen from The Hunger Games. She is a skilled archer and survivor, so she could hold her own against the demigods and the other threats in the crossover arena.
Artie could be a surprising survivor. Despite his wheelchair, he's very intelligent. In a Hunger Games crossover, he could use his brains to outsmart the other tributes. He might be able to set up traps or figure out the best hiding places. Also, the other characters might underestimate him because of his disability, which could work to his advantage.
Well, I think Ginny Weasley would be a strong survivor. She's feisty, brave, and a skilled witch. Her Bat - Bogey Hex could be used to great effect against opponents. Luna Lovegood could also make it. Her unique perspective and knowledge of magical creatures might give her an edge. For example, she might be able to befriend some strange magical creature in the arena and use it to her advantage. And of course, Harry Potter with his ability to face great evil and his quick thinking would be very likely to survive as well.