Let's say for example:
make comeback: Blackpink - because of hella long hiatus | Everglow - because of already surpassing 200 days without comeback
wait longer for comeback: IVE/(G)I-DLE - because both still have most recent songs topping charts and doing great
change concept with comeback: Purple K!SS - here if we assume that one song is darker, and next is more fun then as Memem had those girl crush/darker vibe then new comeback should be more like Zombie or Skip Skip (that one fun b-side that everyone digs).
those are just examples, I'm curious about your thoughts!