Which TV shows were left open-ended?

Trying to compile a list. "Open-ended" truly when plot points that were intended to be solved in the future where left dangling due to the shows cancellation. Here is a full list of the shows I want to know about, I will be marking with three hyphens the ones I know for sure were left open-ended.

constantine---
arrow
flash
legends
black lightning
batwoman
stargirl
superman and lois
vixen
the ray
powerless
krypton---
titans
doom patrol
swamp thing---
pennyworth---
naomi
gotham knights
dead boy detectives
legion of super heroes
young justice---
green lantern tas---
beware the batman
harley quinn
kite man