#1. Have Lana respond to Liv Morgan's actions
Whether WWE likes it or not, they are going to have to give some kind of answer as to why Liv Morgan would reveal herself as Lana's lover and why Lana was in this situation in the first place. Now that's going to require a lot of backtracking and world building in order to do so, but that would be so much better than the alternative.
In all honesty, WWE has gotten away with not telling the whole story and doling it out as bread crumbs for so long that to tell everything up front would just be so refreshing. WWE could even frame it as "Lana or Liv Morgan tells all at the top of the show," which is bound to get fans tuning in from the get go.
New Champs in WWE! More RIGHT HERE
Again, WWE might not like this method of storytelling, especially since it forces them to reveal things they could just reveal later, but it gives fans a huge payoff for being invested for so long. Beyond that, it's not like anything they reveal would vastly effect the greater landscape of WWE and it could all just be consolidated into this one storyline.
There is absolutely no risk here to giving fans the answers they are searching for and while they might feel inclined to hold off for awhile, the fans deserve better.