Read this:
http://blog.bioware.com/2012/03/21/4108/specially this:
"We’re working hard to maintain the right balance between the artistic integrity of the original story while addressing the fan feedback we’ve received."
Pay attention to the wording. I see it as a clear sign that they're maybe going to try explaining the endings, and not change them in any capacity.
If anyone is holding their breath hoping for any sort of happy ending, better to cool your heels and move on to something else.
We're likely to just get the same excrement we already got (shep stuck/dead somewhere, squad separated), except with bells and whistles. They'll just be adding salt to the wound. Pfeh.