Your poll presents a false choice. Are you concerned about virtually every next-gen game? Because Sony and Microsoft both haven't really shown any next-gen stuff yet, as you'd expect considering the consoles can't even be pre-ordered yet. And they aren't going to let the first look at gameplay be the current gen version.
If anything, Halo is actually the next-gen game we've seen the most of, as there's been two trailers.
If Microsoft's E3-replacement comes and goes, and we still haven't seen much of Halo, THEN I'd start to worry that there's issues. Hell, 343 said at E3 2019 that their plan was to basically go silent for a long while -- and that's exactly what they've done.
Halo is going to be part of Microsoft's hype machine rolling up to the console launch, meaning they will reveal more of the game at a time that they think will have maximal impact for the hardware, not just the game.