Overall comic book heroes becoming online gaming characters are going to be particularly popular images for gaming developers to use, which is already reason enough to get them included. Online slot games are already going to have a fairly tangential connection to a lot of the images that they use in order to get people on board. The actual mechanics of slot games are going to vary, but they can only vary by such a wide margin. Still, people are going to respond to certain slot games rather than others, and this usually comes down to the title cards. The developers who understand this principle are going to be the people who are able to design the most popular games.
As the German's say: "online casino spiele" is rising in popularity, especially where Automatenherz website is concerned! A lot of this comes down to the fact that the games themselves are getting better and better. The developers are getting better at producing good graphics for the games, and they're becoming more talented at creating the sorts of games that people are going to want to play again and again. However, some of this also comes down to good marketing, so to get a comic book hero to star as an online gaming character is good marketing in its own right.
Since comic book heroes are frequently American in origin, it's often worth considering how international gaming communities are going to respond to the popularity of comic book heroes as characters in online slot games. Some international gaming companies are going to feature American comic book heroes anyway. Others might try to popularize some of the more locally famous comic book gaming heroes, possibly bringing them more into the international mainstream in the process. As the German's say: "online casino spiele" are widely played today, and they could be used to popularize certain comic book heroes in their own right.