Such a ending is quite possible. Fujino uses some pretty fantastic techniques in the game. For example, erasing the mind in the real world.
Imagine that towards the end of the game, the goddess Administrator will be reborn in the real world and, as a reward for feeding her "anxiety", will send Kirito's mind to the past, and Kirito, knowing about Asuna's betrayal and that it happened because of Inoda, simply will not go to the place where the wounded Inoda was lying.. And she will do her best to protect Asuna from meeting him. There will be an ending in which Kirito is still a little mentally broken, but at the same time, he has a goal to fix everything. Liz will never get to know Inoda. Kirito knows that Suguha is in trouble and will save her from Hebeshima. Preventing Klein from meeting Alice... I don't know what to do with Sinon. It's hard to figure out how to avoid problems with her, since she's a member of the Council. If Kirito uses his familiarity with the police and sends Hebeshima to prison, then Sinon might be able to avoid some mental problems.
The ending can be called good, but Kirito will never be the same anyway. Literally, he alone will bear the burden of the future.
As always. The lone black swordsman.
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