Always, always, always give credit to the people that created the thing that you are working on, that you adapted, that you are extending, that you are doing something else with.
I’ve watched many a Marvel movie and often wondered why they do not start with the people that created that “thing” that spurned something so incredible.
What are we afraid of if that should happen?
What would be so wrong if they became more than a byline credit?
https://www.cbr.com/deadpool-rob-liefeld-marvel-fallout/
Without the creators, we have nothing to start from, take in or enjoy – this goes beyond comics, but everywhere in life – give credit where credit is due.