Perhaps the murmurs of the PS4/XB1 1080p trilogy port is their way of allowing players to take their saves into the next game.
What is there to import? If they do anything I imagine it will be like DAI with the Dragon Age Keep that lets you pick and choose what choices you want, but even the next ME isn't going to have a whole lot to choose from. Endings cannot be honored. Maybe who lived and who died could be used for cameos or history logs, genophage could come into play depending on how they want to utilize the Krogan, but I have a feeling they'll just walk that one back to whichever suits the game's needs not what the players chose. Geth and Quarian will be the same, I expect they'll choose cooperation between the two rather than wiping out one or the other.
Personally, I would rather the pick an ending, and jump and few hundred (thousand?) years into the future. There's a reason they're not calling the game Mass Effect 4, and if they're just going to stick to dealing with the near-immediate fallout of the ending of the trilogy, well then they might as well just call it Mass Effect 4.
I loved the trilogy, I enjoyed the characters, but that story's over. And the universe is so detailed, and the lore so rich, that they can afford to make a clean break from the trilogy and give us something new.
I'll play Mass Effect: Shadow Broker's Revenge whatever it ends up being. But I do admit that i'd a bit disappointed if it ends up being 40 hours of "Spot That Reference".
They shit the bed, now they have to deal with it. I don't want the game to dwell on ME3's events but simply to realistically portray the results of that event, like a great man once said "This is what happens when you find a stranger in the alps." BioWare found that stranger, now I want to see what happens. Jumping ahead a few hundred years, let alone thousands, is beyond cheap and stupid. It's just an excuse, a very weak and illogical one, to whitewash events from the prior game which then creates a myriad of issues on top of it.
Part of ME's identity is it's a near future setting, what would happen if we had this rapid advancement in technology and discovered a whole galaxy full of sentient races in the matter of a few short decades. If you jump ahead a few centuries, let alone millennia, to separate yourself from the previous games then you are also completely obliterating the connection it has to today. An even bigger issue to me is simply how technology/society would advance in that time. You jump ahead that far and technology is bound to rapidly change, as would society. You'd basically have to recreate everything, which would possibly result in a Galaxy that people don't recognize as ME, and if you don't do that in order to preserve the ME setting and feeling then you have to come up with some half assed excuse as to why things aren't that much different than 500+ years ago which never works out.
Setting the next entry several decades, maybe a century, after ME3 is a lot of time in the ME universe, at least for humans. I mean the events of ME only take place 36 years after Humans discover the Prothean ruins on Mars, another 50-100 years would be a hell of a lot of time for things to advance and all sorts of stuff in the galaxy to change.