The last moment of the last episode doing season one of Isekai Quartet there is talk of Transfer Students. This is follow by a season two announcement! Does this mean we are getting more students from other Animes? With the number of cameos from the other characters from the four shows that are the focus of this anime it would feel odd to push them into the same class. Even more so as many of them is part of class two now.
Crunchyroll and Funimation was streaming the first season as it airs. This anime Short takes characters from Re:Zero, Overlord, KONOSUBA, and The Saga of Tanya the Evil. Focus on the school setting which all the characters note how silly the entire thing is, but are powerless to do anything about it.
There is two things that all these animes have in common. First is that they are all Isekai animes, and second is that they all are under the branding of Kadokawa. I am going with an assuming that they will bring in another show which hasn’t been conformed. With everything in mind I would say there is a good chance of the new transfer students if another anime being ether That Time I Got Reincarnated as a Slime or The Rising of The Shield Hero. There is a off chance of them using a less popular show, as they do have other Isekai’s that they have access to, but that would also run the risk of alienating people who haven’t watched the other anime from the show a little. That Time I Got Reincarnated as a Slime is already conformed for a second season.