Explaining Red X as Jason Todd theory.
There's a lot of mystery surrounding the Teen Titans original character's identity. By far one of the most popular theories is Jason Todd is Red X.
Teen Titans: X - Page 17 by pinku on DeviantArt
The Teen Titans Confessions Blog — Thank you, but it's not me who
In Teen Titans, who became the next Red X , it wasn't Grayson
Who Really Is Red X?? - Teen Titans
Teen Titans: X - Page 18 Teen titans, Fan comic, Titans
Enjoy Teen Titans! on X: One more is just knocking a theory out
In Teen Titans, who became the next Red X , it wasn't Grayson
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Why do many fans think Red X is Jason Todd? - Quora