knight504 said:
I took it for granted that he'd return to Kiri and then reform the Swordsmen. He was, as far as we know, basically kidnapped from his home and kept imprisoned after all.
He was kidnapped and imprisoned by Orochimaru though, not Akatsuki. Nobody forced Suigetsu to try to capture Killer Bee, or invade the Kage Summit, or assault the Raikage. He committed all those crimes of his own free will.
Of course, we know he did those things because he's inexplicably fanatically loyal to Sasuke... but the Kage don't know that. To them it must look as if Suigetsu was just another minion of Obito, working hard to help him enslave the world. Juugo at least had the excuse that only Sasuke could control his berserker rampages so he had no choice but to obey him, and thus he could plead that he was coerced into helping Obito enact the Moon's Eye Plan. Suigetsu has no such justification.
knight504 said:
Him being given a pardon would probably be one of the less ridiculous results for a character who was on the wrong side during the last few arcs.
A good point. If Kabuto can be pardoned despite being solely responsible for the zombie army that must have killed tens of thousands of ninja, including reviving fucking Madara Uchiha himself, then no crime is beyond forgiveness. I suppose Suigetsu could have argued that he helped revive Orochimaru (who raised all the previous Hokage from the dead) so he indirectly played a vital role in winning the war. That could have earned him a pardon. Or Sasuke could have simply demanded Suigetsu be pardoned and nobody would have had the guts to argue with him about it.
But as nixofcyzerra pointed out, that doesn't necessarily mean he'd be welcome in Kirigakure. Would you want to live in a village where all your neighbors know you willingly worked for the terrorist organization that mind-controlled their leader for years and which nearly enslaved the entire world? Even if you did betray that group in the end and eventually joined the fight on the Shinobi Alliance's side, a lot of Kiri-nin are still going to hold a grudge over that.