I would like to imagine that this game series can extend to at least 4 entries, one for each season of the year (Summer life, Winter life, Spring, Fall).
As for mechanics or scenarios, I'd really like to see what the developer has in store.
We've had the mainstays of small pixel scenes (kiss, hand-job, blowjob, missionary, doggy, standing, location specific) and CGs.
Large pixel scenes seem to have more variation from Summer to Winter, accounting for H level and time of day, along with a zoom in feature.
Summer Memories' DLC had a beach summer and camping scenario, while Winter Memories' DLC has yet to be announced.
I'd really love to see an increase in the number of large pixel scenes, POV alternative viewpoints for scenes, along with a return of various scenarios of the previous games (sex on the roof, sex by the telephone poll, sex in the convenience store, sex in the town etc.).