Board Thread:Arrow discussions/@comment-1783334-20170516181147/@comment-24152851-20170802034456

They do delve into from time to time, but Arrow at heart is the most normal show in the Arrowverse, and will usually turn to normal answers.

The earthquake machine is already an example of them going more realistic. In the comics Brion Markov was the superhero Geoforce, instead of a scientist.

While they had to go into the super serum, they threw a lot of science in like it caused rapid cell regeneration. Plus it was the only thing giving super strength at that point.

Ses 3-4 delved into mystics which was a larger departure from the realistic approach, but season 5 went back to the roots.

Sorry let me rephrase that. I didnt mean Black Siren wasnt coming back, just its an isolated incident of them exploring parallel Earths. The creators actually said they generally leave the comic book fantasy elements to Arrow's colleagues like Flash and LoT. Since they have two shows filled to the brim with scifi they wanted to keep one show reasonably real.