I'm not sure specifically as there could be many 'bullseye graphic novels' with different stories. It could be about a heroic character named Bullseye, or perhaps it has a plot centered around a target or goal (as 'bullseye' can imply), with lots of action and adventure depicted in the graphic novel format.
In many tellings of Bullseye's origin, he was an outcast from an early age. He was not part of the mainstream society and had to rely on his own instincts. His origin story could also be linked to some sort of trauma or difficult situation in his childhood that made him focus on developing his aiming skills. For example, he might have been bullied and found that being able to accurately throw things at his tormentors was a way to defend himself. As he grew, he continued to hone this skill and it became his trademark, leading to his identity as Bullseye in the story world.
Deadshot's origin story is that he was a skilled marksman named Floyd Lawton. He came from a wealthy but troubled family. His father was abusive, which led to a lot of inner turmoil for Floyd. He grew up with a fascination for guns and shooting, and his skills became legendary. Eventually, he turned to a life of crime, using his marksmanship for hire, taking on assassination jobs and becoming one of the most feared hitmen in the DC Universe.
First, you need to understand both characters well. Naruto is known for his determination and belief in friendship, while Deadshot is a skilled assassin. Then, come up with an interesting premise for their meeting, like a shared mission or a wrong - place - wrong - time situation. Keep the dialogue in character. For example, Naruto would likely be more talkative and try to persuade Deadshot towards a more positive path, while Deadshot would be more focused on the job at hand. Also, don't forget to add some action scenes that play to their strengths. Naruto's ninjutsu and Deadshot's marksmanship can make for some exciting battles in the fanfiction.
In some of the best Deadshot stories, he is often pitted against other highly skilled assassins. His internal struggle between his job as a killer and his own sense of morality makes for a really interesting narrative. He has moments where he questions whether what he does is right or wrong, which adds depth to his character.
In the world of comics, Batman has survived all encounters with Deadshot. Batman's skills and intelligence have allowed him to evade Deadshot's lethal attacks.