God of War, I Don't Know

Well it's happened: The trailer of the new God of War game has dared to show it's face. It indicates a) an aged Kratos and b) a trek into Norse mythology.

I once remember reading that David Jaffe had plans for God of War as series in that Kratos, with each new game, would travel the world, storm his way into another mythology and slaughter all the deities within it. Now, it would seem that that plan is going ahead.

But a new iteration to the God of War series does nothing to sell the IP as a series to me. I enjoyed the first game but with each new game it is becoming difficult to connect with Kratos. Sure it may be some entertainment value to see him slaughter through anything dumb enough to stand in his way but that can only last for so long.
I've said it once and I'll say it again: My main problem with Kratos is that, as a character, there's not a lot you can do with him. As a result, with each God of War game that has followed the first one, Kratos' reasons for his rampaging has becoming increasingly flimsy and often makes him out to be a spoiled brat who would rather blame other people for his failings. Yes in the first game Kratos had the motivation for revenge but since then he's taken up slaying deities because Kratos was being jerk.
But now, the series is in a rather uncomfortable position of stagnation: the people who play the God of War series have become so accustomed to see Kratos make a bloody rampage that it's now expected. Anything less simply won't do at all.

I still stand by my declaration that Kratos needs a mirror character (hell, I've come up with even better ideas for future God of War games). Because, if anything, it's the only way I see that a God of War sequel has a hope in hell of succeeding.
So let's expand on this mirror character idea: Some nameless, faceless woman is cut down by Kratos as she was in his way. But the woman has a husband who swears vengeance. And seeing as Kratos has ascended to godhood (well he did at the end of the first game), this widower travels across Greece to try and obtain the means to slay a god. It may be a repeat of Krato's original journey but it provides a mirror - and makes the final confrontation with Kratos all the more engaging.
And better still, it provides an interesting angle on internet debates on whether Kratos can defeat anyone he is confronted with.

But sadly such idea may never be released: Why give depth to Kratos as a character when we can just have him punch out Thor and Odin?