I dunno. I mean, considering how large the cast is, they can easily start spending like half an ep each to give their history.

So far, they've covered 3 (well, four) people:

  • Yuri
Iwasawa
Hinata
Naoi

I'm hoping for more GirlDeMo concerts at least.

Beyond hitting up the support chars, I can only see a deeper dive into Kanade's role in the world, Otonashi amnesia, and Yuri's ambitions:

  • Otonashi's amnesia I'm sure they have to resolve SOMEHOW...Or so I hope. It was the hook to get into the world.
The dynamics between Yuri and Kanade is something, considering the role Kanade currently holds, as she's no longer the SCP. Not sure what's gonna happen with Naoi, since they haven't clarified if he's passed on or not. (Probably has, considering the events in ep 6.) Will Kanade re-assume her position?
Kanade's over-arching role in the world isn't clear from ANYONE's POV, apparently, ours or the human chars. And she's pretty quiet about things.

Next thing we know, the SSS and Kanade compete for the SCP seat. I mean, Yuri's still trying to find and fight "God", and considering what Naoi said...

About GitS: Okay, yeah...That jogged my memory...That'd be cool to have. ^_^