Look, this show sets up its plot points and romance arcs with such painful obviousness they’re probably visible from outer space.
If you have to rely on subtext to justify something on this show, it’s not actually there.
(tl;dr no, I don’t think that’s the plan as of right now. If there’s another time jump later on then maybe, but I don’t think the Reign stuff is really going to be about Alex, other than in connection to how it affects Kara.)
It Came from Outer Space (1953) Invaders from Mars (1953) The Beast from 20,000 Fathoms (1953) Creature from the Black Lagoon (1954) Them! (1954) Tarantula! (1955) Forbidden Planet (1956) Earth vs. the Flying Saucers (1956) 20 Million Miles to Earth (1957) The Black Scorpion (1957)