Here are my thoughts on what we should see in NG4. In general, I think Razor's Edge moves the series in a good direction and introduces some good things that I hope Team Ninja further develop/enhance/refine:
- the dismemberment and Steel on Bone system works great for NG moving forward. Now, I think the challenge for TN is to further expand upon and enhance these mechanics, perhaps in a way to give the player some more variety and control over these features. I do NOT think that NG should mimic the Blade Mode cutting feature of Metal Gear Rising, something that I thought was cool but not necessarily great. I think they just need to build off the of dismemberment and SoB....perhaps give players distinct control over what part of the body is dismembered by mapping combos in a more specific way. Another idea might be to give players more control over a specific Steel on Bone counter-cut and/or to allow player control once the blade is buried in the enemy so that you can control in what manner and what direction you cut out of the enemy's body. This can then allow you to fluidly flow into cutting other nearby specific opponents in the direction you want.
- the combat system can be added to as well by allowing you to perhaps seamlessly integrate wielding two weapons at once or even better, to dynamically blend both unarmed combat ability and maneuvers with also weapons based moves. This could allow some great unarmed combat integration, including the possibility of disarming enemies and using their weapons to kill them and also iai fast-draw type techniques.
- keep the focus of NG on Ryu and on the single-player campaign/experience. I want a long, well-developed single player campaign with a great story (NG3 goes in a nice direction in at least attempting a more complex, character-driven narrative) and the focus on should be on Ryu in the game and on NG characters (I like some DOA character cameos but I prefer the two series remain somewhat distinct). I like the idea of other playable characters but keep them for Chapter Challenge and Ninja Trials.
- it goes without saying---- incorporate several weapons and Ninpo.
- greater variety of stages and mission types within each stage, giving nice, diverse context to the combat situations.
- the KEY area I think NG needs to go into next is creating more complex, dynamically different environments. The combat gameplay must remain the focus but give us more complex environments which the combat is set in and which will actively affect combat. Environments where Ryu can more actively use parts of it in combat, environments that actively change and environments that are large and which allow perhaps multiple paths through them (while still remaining overall linear). The stealth aspects which NG3 just barely introduces are a great example of how this can be expanded upon----imagine a huge fortress type stage which Ryu has to infiltrate.....he can infiltrate the fortress in different ways and use the environmental factors (smoke, fog, darkness, sand, snow) to surprise attack enemies within the fortress. So, stealth gameplay in NG becomes not about sneaking around and sneaking up on enemies, etc. but more about surprise attack where Ryu bursts out from unseen to take on an enemy cluster. NG could also introduce more complex enemy AI states----so enemies that are confused, blinded, terrified and how that could affect their combat behavior (think Mark of the Ninja but in an action context).