Well, the Red Tornado's back story is really interesting. He was made by T. O. Morrow, who's a pretty devious character. At first, Red Tornado was just a mechanical construct without emotions or free will. But then, through various events and experiences, he started to evolve. He realized that he didn't have to follow Morrow's evil plans. He learned about right and wrong, and decided to use his powers for good. His powers, which include super - speed, flight, and the ability to generate tornado - like forces, are now used to protect the innocent. He's been through a lot of battles, both against his own programming and against other villains in the DC universe.
One idea could be that Red Hood and Supergirl team up to stop a powerful alien threat that has infiltrated Gotham City. Red Hood's street - smart skills combined with Supergirl's superpowers would make for an interesting dynamic.
Supergirl has super strength which allows her to lift extremely heavy objects. She also has heat vision that can be used as a weapon. And of course, she can fly. Wonder Woman, on the other hand, has super strength as well, but she has unique weapons like the Lasso of Truth which can force people to tell the truth, and her indestructible bracelets which can deflect bullets.
Supergirl could potentially win. She has the same powers as Superman under a yellow sun. Her heat vision can be extremely powerful. If she uses her speed and heat vision in a coordinated way, she could overpower Wonder Woman. Also, Supergirl might be more adaptable in different environments as she has had to face various threats on Earth and in space.
One interesting scenario could be that Saitama and Tornado team up against a super powerful villain that neither could defeat alone. Their different powers - Saitama's overwhelming strength and Tornado's psychic abilities - would make for an exciting combination.
One possible plot could be that Tornado initially challenges Saitama out of pride. She sees his nonchalant attitude and wants to prove that her psychic powers are superior. Saitama, being Saitama, just goes along with it. As the battle unfolds, Tornado throws everything she has at Saitama, but he just dodges casually. Eventually, Saitama throws a light punch that knocks Tornado back, but not seriously hurt, which makes her realize his true strength.
The use of alternate universes is also popular. In an alternate universe, Supergirl could have different powers or a different personality, and the same goes for Doomsday. This allows for unique and unexpected storylines where the outcome of their battle is completely different from the mainstream comics or shows.
Saitama's power is his physical strength which is seemingly limitless. Tornado, on the other hand, has psychic powers. If Tornado could somehow manage to immobilize Saitama before he throws a punch, she might have a chance. However, Saitama has shown resistance to various attacks. In most fanfictions though, the outcome often depends on the theme the writer wants to convey. If it's about the power of the underdog, Tornado might win. But if it's about the ultimate power, Saitama is likely to come out on top.
In a fanfiction scenario between Tornado and Saitama, Saitama would likely win. He's so overpowered that he can defeat any opponent with one punch. Tornado is extremely strong with her psychic powers, but Saitama's strength seems limitless. His simple training routine has made him so powerful that no enemy has been able to withstand his punch so far.