I certainly don’t think it’s IMpossible, but I’m not really sure where the anime would take things. The SSS story is already done and I feel like four seasons + the movie encompass everything pretty well. If they continue, they’ll probably have to create a new plot, and with three groups now, it may be difficult to give everyone sufficient screen time to please everyone. (I would like to take this time to remind everyone that Haruka is not going to “choose” anyone, this will never happen or else many fans would be outraged)
I think the two next big things that most JP fans are still waiting for are 7th Stage and Dolce Vita (the next visual novel), which was announced several years ago but is yet to be released or even talked about in detail. Heavens will make their first game appearance (I’m guessing as supporting characters), and my hope is that they’ll eventually get their own visual novel.
If this happens, there will be enough material to borrow for a future anime season. I’m sure everyone will probably want more of the anime, but it might be difficult to move forward until 7th Stage happens (or doesn’t happen) at the very least.
