Just to be clear. There were never any plans to make Karlsson Academy as a game. Karlsson Academy exists only as an educational institution in KG, where all the Karlsson sisters (except Veronica and our Olivia) studied and where they were diligently brainwashed with propaganda about female superiority and similar crap.
As for the hypothetical continuation of KG, from what we know, it is not planned at all, but there are plans for some (existing in the dev's mind) 7 games, united by one common "post-KG" universe. One of these games, will be Quantum Academy, which is being created by Anais, with Tess writing the story. But again, this game is not a direct sequel to KG in the sense that you might think.
The only thing it has in common with KG is Astrid, who survived the events of KG, references to Veronica's great deeds (she is an important character who has influenced the entire game universe) and the fact that you can customize your male protagonist's personality based on several pre-made options, including that 1 very space ending, which one day you will be able to
(along with a dozen+ others in final of KG). In general, if you haven't seen
this post, check this out. BTW, Game#1 is Quantum Academy.