Possibility of old events returning?

Besides making ridiculous amounts of money off of the visitors event, I enjoyed the new aspects they were testing - moving platforms (have we ever seen those again?), changing backgrounds that progressed over time, aliens invading all maps (this needed to be worked on, though), and the plot twist where we were the aliens from the future.

To this day I am disappointed I missed some of the transitions between the "parts" of the invasion event, and missing out on some aspects of the event. I still have that OS4 shuttle coupon from one of the quests on my Marksman.