Dave, no offense, but your hypothesis is pretty far off.
The reasoning about the delay is the exact opposite of trying to ride the coattails of the Ghosn scandal, if the announcement would have gone on as planned last Wednesday, all of its air sucked out because of the scandal. They wanted to talk about their EV plans, (which are solid) and not what the scandal means to their commitment to BEVs (which is also solid.)
The global ZEB group is going to let things cool down and wait until January. Every Nissan person I have talked to in the last week, were blindsided by what has happened, but are all business as usual.