Where would 343i take Halo though?
I've always thought an RPG could work, but the problem here is that 343i has done so much digging in the past that, even if, say, they would create a Mass Effect like series that followed humanity's war with the Forerunners and the Flood, etc. - what would be the point of all that? We already what happened. I suppose they could try and tell a personal story set in those times that isn't necessarily about a failed attempt to save humanity, but would that work?
As of now it seems the only way forward is to go forward and set a new series in the franchise centuries later perhaps.
A brand new chapter in the Halo story taking place centuries later. But, what then, would they still feel obligated to bring back Halo installations somehow as the universal threat, would that just feel like a retread to some?
I suppose they could do a step "sideways" like Mass Effect: Andromeda, but then you run the risk of upsetting fans that believe Chief should be the only hero of his time and introducing a new protagonist of equal or close importance undermines that.
The biggest question remains what to do with Master Chief. Should 343i turn him into Doom Guy and just keep bringing him back, or should Halo move on beyond Chief?
I think Halo can live on without Chief, I just don't know if it should, or in what incarnation, and whether or not it could work without taking a significant break before breathing new life into the IP.