There are speculations that a demi-god might appear in the upcoming episodes of the new season. It might lead Ken to his demise in the latter episodes, and the character is also expected to power and control thereon. The pace of the season is also expected to be fast considering the long hiatus it has been on.
A lot of people have started focusing on the manga to satisfy their cravings and to bring down the level of curiosity. It is promised that the third season will remain loyal to its dark scenes and gory plots from the previous seasons. The change that will be brought about would only enhance this aspect.
Reading the novel alone can be a little difficult to interpret as it is supposed to be used as a companion when one is watching the series. The intention that this combination works on is for the novel to focus on those depths of its characters that the anime cannot include in its screen space.
The fans desperately wait for an official update on the release of either the third season or the film. It is still a mystery if that will happen anytime soon or will the fans get disappointed again.