Well, Jubei in BlazBlue Central Fiction has distinct features. One of them is his agility. He can move around the battlefield very quickly, which gives him an edge in combat. Also, his special attacks often have a wide range of coverage, allowing him to control the fight to some extent. His design is also quite appealing, with his traditional Japanese look.
Perhaps an old rival of Jubei's who has turned to the dark side. This character would know all of Jubei's weaknesses and fighting styles, making them a formidable foe. They could be plotting to take over the BlazBlue world and see Jubei as the biggest obstacle in their path.
Maybe a fanfic where Jubei takes on a young apprentice. This could show his mentoring side and how he imparts his knowledge and skills. You could include scenes of training, as well as the apprentice getting into trouble and Jubei having to rescue them, all while teaching important life lessons.
I don't have the exact date of when Jubei was added to Central Fiction off the top of my head. But a good way to find out is to look at the game's patch notes or ask other dedicated players in online gaming communities.
At present, BlazBlue Central Fiction appears to be the most recent game, but the possibility of future entries depends on various factors such as fan demand and the developers' creative vision. So, we can't definitively say it's the last one.
I have no clear knowledge of when Jubei will be released in Central Fiction. Maybe you can search in gaming forums or follow the game's social media accounts to get the latest on this.
Yes, they can be. For example, 'BlazBlue: Phase -0-' gives a good introduction to the basic concepts and characters in the BlazBlue world. It doesn't assume too much prior knowledge, so new fans can start here to get a feel for the series.