> I am going to just simply wait and find out for myself when 343i will announce their development for the next Halo installment. Thank you all for sharing your ideas and opinions folks.
As am I.
You guys have no idea how glad I am that this thread is still going strong. Thank you, fellow Sangheili (and the Spartans), for continuing this thread and keeping it strong. I apologise for my (somewhat long) absence. Though I’m a bit sad I missed hitting the 343rd page. 
As the Remnant would have a considerably smaller force than Thel’s faction, they would have to resort to somewhat guerilla tactics. We know they have no qualms about using bombs or any form of terrorist attack. As such, I would prefer they had a more ghost-like demeanour, perhaps almost an almost skulking way of movement and fighting, making full use of Active Camouflage systems. The Remnant would (in my ideal world) attack viciously, almost desperately, though never lacking the determination to win and pride we have always seen in Sangheili, though at least trying to keep some measure of honour. I would love to see them as shadows of the former-Covenant’s might, as in Halo 4 we simply see them behaving in the same fashion as the Covenant did. Which I feel is a somewhat wasted opportunity.
Thel’s faction, however, would need to be more proud, professional. Countering the Remnants with signature Sangheili skill and superior technology. Though I don’t want Thel’s faction to hate the Remnant, nor do I want them to see themselves as superior. In an ideal world, I would prefer it if Thel’s faction saw the Remnants as equals, fighting for their belief system as his faction is. To be honest, I would just love Thel’s faction to be the same as we saw previously in Halo 2 and 3. 
As for armour, I would prefer the Remnant kept their armour, but a little more barbaric, perhaps incorporating cloaks? (Yes, I know) Thel’s faction, however, I would hope, use a more Halo 3-esque armour, looking similar to that piece of artwork I have shown multitude of times by Leviwastaken; a more ancient look. Though I wouldn’t particularly mind if they use the same armour models, I would just prefer Thel’s to wear a lighter colour to differentiate. 
Just conveying my thoughts, using the usual idealistic viewpoint. ;D