It's already guarunteed that:
1) There'll be no GoW esque "lose all your powers" thing. We'll get most of our powers back, and we're just going to become even more epic.
2) No black and white, or as I call it, nice or ass hole, choices. There's going to be ambiguity. Ideally I hope they don't even go on to label the choices as good or bad, but just let us decide that ourselves.
3) Some elemental mixups
4) Other people getting powers (probably more powerful versions of the conduits we saw in inFamous. My hope is that there'll be some serious elemental characters who you'll get to decide to team up with, fight against, etc)
5) Bigger boss fights
========================================
They need to fix:
1) Repetitive missions
2) Over all "cheap" quality (maybe impossible, due to it being a sandbox game. But it never felt like a true city with all the stupid civilian AI
3) Replayability (a turf war feature or some onslaught/survival kind of mode will be awesome. Other than that, more serious crimes going on than the occasional mugging or healing).
4) Up the damage a bit, to emphasize both the running and covering part. You need to run and keep climbing to new places to avoid getting flanked and overwhelmed, and you have to run to a smart place, not just to any place. This was the gameplay I loved the most.
=======================================
What they can add:
1) Factional story line. Bring back Moya with the government, push the purification group, push some kind of new age Ray Sphere group. That's where the ambiguity will be, which faction to support? Create memorable elemental characters that you'll get attached to, and then decide if you want to save them, or go with what you feel is right. Basically take a more Deus Ex 2 approach, but with a much better story and execution.
2) Power/elemental mixups. Not creative enough to think of any myself. But using Bioshock as an inspiration is a start.
3) More environmental interactions. Goes hand in hand with 2. Again, bio shock.
I'm gonna go take a shower now.
