They contribute in several ways. Firstly, they keep the fans engaged between movie releases. They also introduce new concepts and ideas that might later be incorporated into the movies. For instance, some new villains or plot twists can first be tested in the graphic novels. Also, they can provide different interpretations of the characters, adding more dimensions to the overall MCU franchise. Moreover, they can attract new fans who are more into reading graphic novels rather than just watching movies.
Not always. While the MCU draws inspiration from the comics, there are often changes and adaptations made to fit the cinematic universe and modern audiences.
The origin stories give depth to the characters. Captain America's origin, with his roots in World War II, adds a historical and moral weight to the MCU. His values shape his actions and influence other characters. Also, his origin story allows for interesting time - travel and alternate - reality plotlines later in the MCU.
The 'watcher' in 'watcher the real story' might be an ordinary person who by chance witnesses something extraordinary. For example, a passer - by who sees a strange event in the street and then becomes involved in uncovering the real story behind it. It could also be a professional like a private investigator hired to watch someone and then discovers the real story about that person's actions or situation.
Without having read 'the watcher from hooked', it's difficult to say exactly who the 'watcher' is. But generally in stories, a 'watcher' could be a figure that monitors the actions of other characters, perhaps to gain knowledge, to protect, or to plot something against them. It might be a human, an otherworldly being, or even an animal with an unusual awareness of the events in the hooked area.