Sasuke could also be a very powerful contender. His Sharingan and Rinnegan give him a lot of combat advantages. If he had Titan abilities, he could use his ocular powers to control and enhance the Titan form. He might be able to see the weak points of his enemies even more clearly in a Titan form and use his lightning - based jutsu more effectively, combined with the brute strength of the Titan.
Madara Uchiha would be extremely powerful. His already god - like powers in the Naruto world, such as his ability to control the Ten - Tails and his mastery of various Uchiha techniques. When combined with Titan abilities, he could create a new level of chaos. He could use his Sharingan to manipulate the Titans or even merge with one to create a super - being that would be difficult for anyone in the Naruto - Titan universe to defeat.
If you combined Edward Elric and Eren Yeager, they would probably be very powerful. Edward has his alchemy skills which can be used for various things like creating weapons or barriers, and Eren has the ability to transform into a Titan. Together, they could use alchemy within the Titan form, perhaps creating stronger structures or weapons directly on the Titan's body.
It's hard to say for sure, but Thor could be a very powerful character. His hammer gives him the ability to fly and strike with great force. Against the Titans, he could use his lightning powers to fry them. Also, his god - like strength and durability would make him a tough opponent for the Titans.
In Titanfall 2, no single Titan could be considered the strongest. Every Titan had their own unique advantages and fighting style, suitable for different tactics and player preferences. Some powerful Titans included the Rocket Titan, Elite Titan, Light Armor Titan, Heavy Armor Titan, and Lightning Arc Titan. The Rocket Titan had powerful long-range firepower and explosive power. The Elite Titan was an all-rounded Titan. The Light Armor Titan had high mobility and flexibility. The Heavy Armor Titan was a defensive Titan. The Arc Titan was good at electric attacks. Therefore, the most powerful Titan depended on the player's tactics and personal preferences.
Saitama is clearly the most powerful. In the Attack on Titan world, the Titans are a huge threat. But for Saitama, they are just like any other weak opponent. He doesn't even break a sweat dealing with the most powerful threats in his own universe, so the Titans would be no match for him. His power is not only physical but also his unshakable will and his simplicity in approaching any fight. He doesn't get distracted or intimidated, which makes him an unstoppable force in any situation, including in a merged OPM and Attack on Titan universe.
Thor would be a strong contender. His god - like strength and the power of Mjolnir, or Stormbreaker, could be very effective against the Titans. He could fly in and smash the Titans with his hammer, and his lightning powers could also do significant damage.
If we consider strategy and intelligence along with power, Levi from Attack on Titan could be a top contender. His incredible combat skills and quick thinking could make him a force to be reckoned with even among the superpowered heroes. But then there are heroes like Eraserhead who can nullify quirks, which could be a huge advantage against some of the more dangerous Attack on Titan characters.
It's hard to say. Thor has his godly powers and his hammer Mjolnir which gives him great strength. But in the 'Attack on Titan' world, Eren's Titan form is also extremely powerful. However, if we consider all - around power, Iron Man with his advanced technology and ability to constantly upgrade his suit might be the most powerful. He could analyze the Titans' weaknesses and come up with strategies to take them down.
In terms of pure raw power, if Kurama (the Nine - Tailed Fox from Naruto) and the Fire Dragon Slayer combined their powers, it would be catastrophic for any enemy. Kurama has an almost limitless amount of chakra and its own unique abilities like the Tailed Beast Bomb. The Fire Dragon Slayer's fire - breathing and combat skills would add to this. They could create a super - powerful attack that could level mountains and destroy entire armies. However, controlling such a combination of power would also be a great challenge.
However, some might argue that Levi Ackerman could hold his own. His incredible speed and combat proficiency with blades could potentially make him a match for some of the Star Wars characters. If he were to get his hands on a lightsaber, he might become an even greater threat. But in the grand scheme of things, when facing the more powerful Force - using characters, he might still be at a disadvantage.
It has to be Naruto himself. His never - give - up attitude and his ability to make friends easily would make him a great addition to the world of Attack on Titan. He could inspire the characters in that world, like Eren, to keep fighting even in the face of despair. Also, his unique powers would be really cool to see against the Titans.