Tonight we'll get to see.. "I choose violence"...
We'll get to see what was "off" about the whole Arya scene...
And we get to see the love triangle that is Brienne, Jamie, and Tourmond!
I trust in the show runner's that the whole Arya thing will make sense.
Could it be the that the real Arya was stabbed, but not as bad and with a bag of fake blood? Was Jaken with Arya's face setting up a test for the waif (who failed by the gut stabbing and increasing suffering - against Jaken's order's).
Could it be that Arya is everyone at the same time and then takes on the name of Tyler Durden in order to blow up the bank of Braavos with wildfire?
It could just be the more plausible option that Arya just got stabbed, but gets rescued by the actress she chose not to poison. The only problem with that is that we've been shown Arya's character learning things all this time and she just acts stupid and gets stabbed. So much for Arya turning into a bad ***. But this option doesn't have as many easily poked holes in it.
It could even be Jaken who saves her, but is under the guise of an older "face" of his. Syrio Forel! (as goofy as it may be, I'm kinda hoping for that one)
The only part that I'm confident of is that the many faced god will have to settle for the waif as the promised death. I hope the real plot is cleaner than all the ones I listed.