To the best of my knowledge, the topic at hand is about the PTAB process and whether that should be upheld due to as you stated the time-barring issue. Additionally, WDDD is challenging 5 of the 26 obviousness rulings from the PTAB directly. But the real issue, with Wi-Fi in hand, is the party at hand and time barring.
WDDD has a real chance to get some of their claims back.