And I think there's no way to do it without it seeming like a transparent cop-out that undermines previous games.
Cop-out? It'd take initiative and gusto to attempt that. Fleeing the galaxy is the transparent cop-out.
Some people prefer their choices not being rendered meaningless in the next installment.
And some people prefer that they actually move the story forward, instead of existing in a stagnant narrative limbo that also renders your prior choices meaningless.
Insubstantial differences don't count for much, as in the Rachni situation. Each time they've done it it's been almost unanimously panned by the fanbase. I give the devs enough credit that I think they won't want to start the new chapter of the franchise with a grand scale implementation of one of their most despised practices.
Eh, I'd rather they not abandon what's established (another practice of theirs that's despised) and concede to some inevitability in the universe, and this would be an excellent opportunity to do it right.
I find that option to be far superior to one that tramples player choice into the dirt.
Pretending as if you're outside the reach of said decisions is its own form of trampling on player choice. I'd rather they be upfront about it and move this galaxy forward.
They're better off leaving it all alone and starting with a clean slate.
Distant-future is a pretty clear slate. A lot can happen in, say, a hundred years. Fifty, even.
No, it isn't.
Yes, it is.
All it definitively proves is conservation of resources
Ah, the conversation killer. Anything and everything can be waved away with "resources".
True conservation of resources would be not including it at all.
Even if we accept the idea that you can look for wide implications in this scene, there is no way you can extrapolate a single constant like that into an entire galaxy of constants that would render the resultant galaxies of the three endings almost exactly the same.
Why not? How else can you explain Destroy, Control, and Synthesis universes producing the exact same event?
Hell, you can't even get through the extended cut slides without seeing common elements among all three endings, and BioWare had every opportunity to make them all look incredibly different.
They did do it for a reason, they did it because in all those endings Shepard becomes a legendary figure. That is the only commonality confirmed by that scene.
Why else would s/he be regarded as "The Shepard" in all universes if there wasn't a reputable degree of commonality? Every ounce of history chronicled about the character, whether it ended with blowing up the Reapers or cracking open the possibilities of physiology and communication, gives him/her the same esteem and the same label way out in the future. That implies a cultural meeting point.
But if you're going to dismiss that as conservation of resources instead of narrative intent, then there's no reason to continue that discussion.
Yeah, the sole projection, except for the epilogues given us by the EC outlining dramatically different futures.
And plenty of similarities, all of which funnel into the Stargazer scene as the last look at the future.