I seriously doubt the D Line Extension will not be finished by the Olympics.
I’ve seen some people saying that based on how long it took to open Phase I, Phase II will open just before the Olympics and III will not open until after them.
But it’s overly pessimistic to assume that it will not be ready in time for the Games. Two major things happened in Phase I that caused it to take so long, which Phases II and III will not have:
The D Line had to be connected to Phase I before they started testing because Wilshire/Western was the western end of the line so they were not connected. Phases II and III are already connected to Phase I, so they won’t have that little delay in testing.
Phase I had 3 stations, the most of the extension. Phases II and III only have two stations each so it will not take them as long to finish the station interiors.
Additionally, Phase I testing was messed up because there were power outages on the line and they couldn’t continue testing until power was restored. What are the chances that happens again?
I’m not saying that it definitely will happen before the Olympics; I have been disappointed before. But I would be shocked if they don’t open it before the Games.