In "The Matrix Revolutions", at the final showdown, there's a brief exchange:

> Smith: アンダーソン君 お帰り  
>  Smith: 会いたかった  
>  Neo: 今夜が最後だ

That's what the subtitles say, anyway. The dub is almost identical for Smith
(he adds "君に" at the start of the second line), but Neo says something
different that I don't recognize. It sounds like: "今夜 けりがつく" (??).

I'm assuming that what Neo says is equivalent in meaning to "最後だ", but I don't
know anything like that that sounds like what he says.

(If this doesn't sound familiar to anyone, I can try recording the audio.)
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2013-12-19T01:55:06.387
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words meaning transcription
What's Neo saying?
<http://gogen-allguide.com/ke/keri.html>

-keri is a conjugational suffix in classical japanese for the past tense.  
<http://www.classical-japanese.net/Grammar/past.html>

Your contextual intuition was correct for the meaning of the phrase.
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2013-12-19T18:16:25.520
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I have a DVD but I think it's a different version because its subtitles are:  

> Smith: お帰り アンダーソン君 待ちわびたよ なかなか壮観だろ？  
>  Neo: 今夜 終わる  
>

and its audio goes:  

> Smith: アンダーソン君 お帰り 君に会いたかった なかなか壮観なもんだろ？  
>  Neo: 今夜けりがつく  
>

(not sure if this answers your question though...)
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2013-12-20T06:26:33.620
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In classical Japanese, けり (from 来あり) had the basic meaning of "came to think
of/realize...". Over time, people observed that this word frequently appeared
at the end of lines in their writing, and combined with the conclusive nuance
of the word itself, began to use it in the transferred figurative meaning of
"the ending".

Reference
[大辞泉](http://kotobank.jp/word/%E3%81%91%E3%82%8A%E3%81%8C%E4%BB%98%E3%81%8F-491130):

> **けりが付・く**
>
> 物事の結末がつく。決着する。「喧嘩両成敗ということで―・いた」
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2015-10-20T15:52:48.010
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