The Blazblue story is lazy. But about Relius' end, It makes me think he has his own agenda. Blazblue has followed every single Anime Sterotype so far so I'm asuming the Shadow Character (Relius) Will play a much, much bigger role in the proper sequel.
Also, Stay classy Hazama, Beat the fuck up, stabbed, smashed, destroyed and still smiling before respawn.