Spoiler for A character-appearance related Question based on the novel:
Do you think Shichimiya would appear in this Anime? Because there is no sign in the synopsis that she would have a chance to appear anywhere.
Maybe KyoAni will make another season. Because they already have her sketch which had been posted in their official site.
I don't think they would just cut her off the story. If they do that, I'll be very sad because she's a character who I'm looking forward to see the most.