Time for me to chime in as well, with feedback and suggestions.
Since DW2 six years ago, it’s worth noting—and perhaps surprising—that aside from the excellent anti-xeno initiatives and the numerous smaller-scale expeditions that followed Horizons, no player-run events of a similar scale or impact, nor the variety of those seen during the Horizons era, have emerged. Or, if they have, they’ve not garnered comparable attention. This raises important questions as we consider the future: “Do today’s Elite Dangerous players (particularly explorers who a DW3 would be aimed toward) still have an appetite for this type of engagement?”, or has this near absence of large-scale community created activity (compared to Horizons) been more down to a technical barrier in some way?
Neither, actually. When it comes to finding out stuff - exploration - large scale player events simply weren't needed. Plenty of new squadrons had formed, people had their own goals, and for surveying stuff, it turned out that coordination is the key: ten well-coordinated explorers can give better results than a hundred players who are just left mostly to their own devices. When Frontier did add plenty of new content to exploration, which was Odyssey, finding things out then didn't require large numbers of players in one general area either.
So, people had a good number of goals, and none of those needed thousands of explorers. The one thing that would need those large numbers are Community Goals, and Frontier didn't add any that went out to deep space.
However, with the Frontier of today (especially seeing they added some in-game support to that AX blockade recently), I think they could be convinced to do that again... and if anyone can convince them, it's you guys. Going by the reception so far, the primary audience for DW3 will be players who are either (mostly) new to exploration or have quit five years ago, so this would be a perfect opportunity to try and get them engaged with exploration again.
I think the developers might prefer to focusing on colonization first... but it's not like that can't be integrated with DW3 either. Anne of the Seals on the FleetComm Discord had a good idea: to propose to FD that the expedition will be about establishing a second colonization hub at Sagittarius A* (or elsewhere). After all, the devs did say that at the start at least, only the bubble will be available as a starting point for colony ships: it would be cool if new starting point(s) were unlocked through CGs and such, instead of the devs just waving a wand and whoosh, suddenly we can launch colonies from anywhere.
Hey, it's even in the name: Distant Worlds.
Anyway, what else was there... Oh yeah, you mentioned "the possibility of including industry and logistics based gameplay", I'd just like to remark on one thing: if there will be anything that involves moving cargo, then players will do that with fleet carriers. That's a certainty. Personally, I don't think that's a bad thing, but it's still something to be kept in mind.
That's all that comes to my mind for now. I hope that you'll move forward and do DW3, and have fun!