Researching physics concepts, theories to make sure my plot is plausible. I am getting so wrapped up in this part...really cool stuff as a young adult in college just thought of as something to get through to get a grade. Now, application is taking effect in a sense. "New" news related to magnetic portals connecting Sun and Earth, negative mass, The Einstein Rosen Bridge, and Biblical occurances all going to be brought into this series.
Also searching similar plots to mine in cinema, written form, and other media to make sure mine has a distinct and unique edge. So far, I'm good.