To follow up, after being told that the TXL-AUH flight was NOT cancelled just yesterday, I checked my reservation on the AB website, and found out that I had been re-routed. Instead of WAW-TXL-AUH-NRT (with AUH-NRT on EY codeshare), I'm now routed WAW-TXL-ZRH-AUH-NRT (with ZRH-AUH-NRT now on EY codeshare). So it looks like they are re-routing people instead of just cancelling or whatever. I'm assuming the intra-Europe routes won't disappear before October or November, so this routing should work fine. Maybe I can credit the WAW-TXL-ZRH AB flights to JL...