I would live to see ryu as a kid and slowly turning into the ninja that he is today
Maybe NG4 could take place before NG1?
Possibly, but I'd rather there be an actual story of the present in Ryu's life with maybe subchapters that revolve around Ryu's memories so that there could be some sort of... progression, if that makes sense.
It's a beauty ain't it?
Alright enough about that, this is gunna be another long one,
TLR at the bottom.
What would I like to see? Well...
Open World - Now hold on, hear me out. I'm also thinking of something closer to Tairon, since it was the center of just about everything in NG1. Frankly, it's not so much that I want [more] than that but to increase the replay value, I'd like to have the access to start off in the Hayabusa Village and at the end of the game, be able to load up my save file, and go right back there or just about anywhere within that world of NG4 to make the game feel a bit less... linear.
I emphasize on [JUST] about anywhere. There are some places that should be cut off or change overtime through events, so much as to not allow you to return. I mean in NGΣ it felt nice to travel back from the military base back up to the area where Ryu dropped off of the airship to Tairon maybe catching something that I missed in the beginning... like a scarab.
Side Missions - With a slightly more accessible world, it'd open up opportunities to travel to certain areas and carry out specific task. There could be a few places that you could pick up these missions, like in example for NG1 Han's Bar could be a place to pick up missions from Rachel, Muramasa could also hand out missions, as well as people in the Hayabusa Village (if it hadn't of been attacked but then again, there would be no focus in the story), and if it were possible to back track to Murai's Dojo then Murai as well...
With a more open world, it'd go hand in hand... only one thing bothers me though... I feel like it might mess with the feel of the game... Ninja Gaiden Black/Sigma gave me one feel: No where is safe, so I have to keep moving forward... creating these spots to return to might take that feeling away.
Customization -
This isn't NECESSARY for single player mode. In fact I'd prefer if it'd not be... but I know some people would enjoy dressing up Ryu and the others in a different way. I mean it'd open up another option with the open world safe spots... an armory, weapon shop, and a tailor.
Sounding like Assassin's Creed yet, lol? But like I said,
this idea is more so aimed towards the online bit so that my character doesn't just look like a ninja grunt, I want uniqueness... I'd like to be able to choose what swords I dual wield, the color of my Dabilahro as well as the whether or not I want it to have lightning surging through it, what color that lightning is, do my katana have markings like the BotA, straight blade or curved, long or short... so that my online ninja isn't uninspired.
A reason I'd see people being against this in single player mode is because it takes the uniqueness out of the weapons in general... why use the True Dragon Sword in the story when you've got 12 other katana in your storage that are 10x more powerful and have special abilities that far exceed it...? I wouldn't want that.
Hayate and Genshin - CE couldn't have put it any better about Hayate. Hayate should appear in the story and fight along side Ryu a few times but especially at the end (maybe even against him when they first come across each other in the story). He doesn't need a chapter either, being available in the Chapter Challenge and Ninja Trials is fine. A Hayate costume for Ryu would be nice as well, for shits and giggles but I won't push for that.
As for Genshin, I just have a thing for swords in general, katana especially... but anyway Genshin has a unique style (reverse grip). If they gave him a full move set he'd be a nice character to mess around with in Chapter Challenge and etc. Doesn't really need a story element... but if they did decide to give him one I have a few ideas.
As for new weapons - I mean I already have my weapon of choice... but for new stuff, something that would be nice... hmmm... I mean what has Ryu really not used? I guess it'd be cool to see him pick up Momiji's Naginata and maybe dual daggers like Ayane... maybe a sheathing style Katana setup? Other that, most of the practical stuff for him has been covered, and I use the term practical loosely, lol.
TLR - Hayate and Genshin, deeper online character and weapon customization, a world that's less linear with the Hayabusa Village as somewhat of a home to return to as well as something to look forward to doing in the story mode after completing it, like side-missions and collecting scarabs...