"High School DxD" already aired its final episode on June 20, 2015. However, there are a lot of fans still clamoring for the making of "High School DxD" Season 4. In fact, there are fan-made theories about what they want to see in the next chapter.
The Japanese light novel's fans shared on My Anime List forum their assumptions and theories that might happen in the next "High School DxD" Season 4. It is quite expected that the series will reveal major twist and turn of events along with a lot of big revelations.
One of the users named Lolimancer thinks that Issei Hyoudou (Yuki Kaji) will go against Loki (Takayuki Kondo) in "High School DxD" Season 4. The user explained that the next installment might start with the Evil God from Norse mythology trying to escape the prison with the help of some burglars from UL (Underworld Lifeforms).
With that, Loki might try to use his great powers to do time traveling and change the timeline in "High School DxD" Season 4. However, he needs to make sure that Chichigami will not come his way, but it looks like Issei will surely appear to stop him.
Meanwhile, Asiastarz reported that if Loki will change the timeline, Issei will ask the help of his future daughters to fight the antagonist in "High School DxD" Season 4. It is strongly believed that his kids will appear in the future with the group of his present harem.
Issei's future daughters will be seen with different super powers in "High School DxD" Season 4 to go head-to-head with Loki. They are Ex Gremory, Kurenai Himejima, Zen Quarta, Shirayuki, Kurobara, Airi Hyoudou, Shin Shidou, Robertina Hyoudou, Helmwige and Ernestine Galnstein. Anyhow, fans should only take this with a grain of salt as nothing is final yet if there will be "High School DxD" season 4.
