I'm perfectly fine skipping the origin if it is explained a bit in the beginning like you are hinting at here (again, I really do plan on seeing this). But, I will say, as a casual, I do not really know the backstory. I never watched the earlier film versions as F4 never meant much to me and that was a party time in my life (and judging by their box office and reviews, I don't think I'm alone), and I just don't know their lore aside from kind of what they are (super smart/stretchy, invisible, fire, and rock). But again, I don't think it needs a full origin story as long as it walks you through it a bit (or at least explains why there are people with powers in this universe).