(Bold) For Halo 6 I can't either, but I could see them doing it if Halo keeps losing populaity or more importantly, it has poor sales. Say Halo 6 doesn't do well, you don't honestly think they wouldn't consider it? Sure they would! Especially if games like Doom, Overwatch and Quake keep doing better and better. At the end of the day it's all about making money. If MS/343I think they can make more money by having Halo that way, they'll do it. Why do you think BF went back to WW1? Or why COD is going back to "boots on the ground" WW2? Because they think they can make more money then there previous titles. I don't want to get off topic, so I'll stop there :)
Nothing at gamescom either on H6 or next major entry. When Brian Jarrard was asked about Gamescom he replied "definitely not"I can't see them going all the way back to classic gameplay. I remember they said that, with the new motion sensor that tracks abilities rather than movement, it was going to be tested for this "and future" Halo titles. Doing a complete page 1 re-write of the core gameplay while also giving the story a massive overhaul would likely make for a product that feels rushed or incomplete even if they had a lot of time to work on it. The likely scenario is that they're going to tweak 5's gameplay for 6's, include a classic playlist at launch, overhaul the story to be more Chief-focused and of better quality, and call it a day.
The next major Halo title is probably a ways off. Which is good. 343i needs to have a clear understand what their core fans want. The classic playlist and setting could be a test bed for that
Doom's campaign was good, but its multiplayer was outsourced to the same company that made Halo 4's multiplayer. That was in no way a game going back to its good old days, as it had loads of modern game conventions such as loadouts and a hard limit on how many weapons you could carry. Overwatch took a large portion of ideas from modern games such as MOBAs as well as modern FPSes and put a lot of polish on it. Quake Champions has characters with special abilities that can change the momentum of a fight, not exactly the most old-school thing out there, especially given what Quake has been in the past. Regarding what I put in bold, BF1 and CoD Going back to a different time period, that doesn't instantly mean that the game is going back to its roots. Battlefield 1 is very much a modern Battlefield game in how it plays; automatic weapons and tanks still dominating the game while planes do their own thing and barely contribute to the match. CoD going back to Normandy for the millionth time is a blatant nostalgia ploy that will hook in people who forgot just how much the industry was saturated with WWII games.
If anything, "Going back"
for 343i likely means re-including split-screen as was promised and putting the focus back on Chief, and may not have anything to do with the gameplay. Now THAT'S something that would make for a good trailer and set of talking points at Gamescom, the Game Awards, or even a special Microsoft event not tied to any industry/press show.