Sometimes, it is hard for us to remember what it was like seeing a superhero movie where we knew very little about them going into it.
When this happens, it makes the film more intriguing, such as the original Iron Man (2008) and first Guardians of the Galaxy (2014), films that were massive successes regardless if you knew the source material or not. It also helped that (at the time of release) the characters were not entirely in the first class for their creator’s. In the case of Blue Beetle, the DC character is barely in the third class of characters, but that is not entirely a bad thing.
Nothing else to say 