Okay I've figured out how to beat this matchup reliably:
On the character select screen, put your cursor over Tager and act as though you're browsing color selections. Once he locks in Valkenhayn, ninja your cursor onto Hazama at the last moment.
The timing is difficult but easy once you get used to it. Unfortunately this strategy will be debunk in CP because the opponent can see whether you're actually browsing colors or not.
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In seriousness, I'm curious how this matchup will be changed in CP. My guess is not very much if Valkenhayn can still run backwards. I wonder if a tk360C/tkGP could possibly win against Wolf rush