DZCS: Hacker's Memory Zoner Concept

Some blubs suggest it could be a side story occurring alongside the original, while some fans think it might be a direct sequel. 

A datasheet released for the Europe localization however states that it's the untold backstory that lead to the events of Cyber Sleuth. 

So I'm going with prequel until something official says otherwise. 

I considered Melody as part of the main Zoner cast for the original game, but chose to go with Dan, Dani and Tommy instead.

Using girls in particular sprung from a complaint from fans stating there (so far) isn't a female option like there was in the original game.

In a prequel setting, Melody came as an advance agent to scope out the situation in Cyber Sleuth Zone.

In a sequel setting, Melody is part of a clean up crew to help mop up a potential spill from leaking out into the rest of the Network. Be it a resurgance in Eaters or some other sort of problem. 
In a side story setting, Melody and Kristi similarly keep Amazawa Keisuke's problems from spilling over into Takumi and Dan's.

Regardless, Melody and Kristi are there to help reseal the crumbling boundaries of the Digital World and Real World, and help Keisuke with his problems along the way. 

As for Brachiomon, I was experimenting with a DigiXros idea for Kristi. Gladimon and Brachiomon DigiXros into Cannondramon and potentially Flash Digivolve further into UltimateBrachiomon.

Doggymon mostly sticks to Custom Digivolutions such as Tokusatsumon. One gimmick I was considering was Doggymon being part wifi sniffer, in that he can pick up the trail of nearby Hackers.