I agree, being a transhumanist and supporter of human enhancement, this ending is probably the best ending to explore in fanfiction.



Think of the questions that can be asked and answered: What exactly does the introduction of the semi-synthetic DNA analogue do to the people who are merged with it? Since the husk in the ending is show to be self aware, does it have memories of its past life, or is it a "new person" who can develop a personality different from its original? Does this apply to the alien husks as well? What is the technology behind the Crucible? Certainly galactic civilization would like to study and possibly harness the technology behind this? Does the Catalyst still exist but merged with organic components, or does it shut itself down after Synthesis occurs, seeing no reason to continue operating? If so, since the Reapers are, at best, semi-sapient drones controlled by The Catalyst A.I. and now allies of the galactic society, are they made individually aware yet still linked in a network like the geth, or they still drones but not controlled by a central A.I.? And biggest of all, what will happen now?



The galaxy is massive, even though Synthesis most likely reached almost all of the galaxy, could there be species untouched by Synthesis? What of them? If there aren't, there's still much room for speculation. Just because the gap between synthetic and organic has been bridged doesn't mean that the world is a perfect utopia. Yes, standards of living will most likely improve greatly, but people will still keep their personality.



Criminals and pirates who have been merged with semi-synthetic DNA analogue are no different from criminals and pirates who aren't. What new conflicts could arise now? Who will deal with them? Will a Commander Shepard of the new era rise? If not, will Commander Shepard's old squad take up the task? How will they go on without Shepard? There's so much room for speculation, the possibilities are endless!