I think AAA in general is on its way out, assuming we're talking about overbloated budgets and huge multi-studio teams and what-have-you. Return on investment seems to be on the decline for both the corporations and the consumers in a lot of those cases now.
I think we'll see mostly just single-studio based projects with teams hovering around 100, not teams of 300+. We'll likely "regress" to accepting this as AAA production, but right now when I think AAA, I think stuff like Mass Effect Andromeda, Call of Duty or Assassin's Creed that got input and development from multiple studios with huge staff and inherent coordination and communication problems of just throwing more people at the project to meet a baseline featureset for a standardized, repeatedly-generated product.
I do NOT think Nier Automata, Yakuza, and the like, as some people have suggested. I am under no impression that they had any sort of the same creative challenges or staffing levels as games I think of as "AAA." I don't even see Nintendo first party titles like Breath of the Wild and Super Mario Odyssey as "AAA" personally... I think they have sufficient staff, sufficient design goals, and creative motivation that sets them apart. When I think "AAA," I really do think huge teams cramming toward a standardized creative end goal -- ie a feature-defined sequel or follow up to an established and well-received gameplay formula.