I love the animation they released! I have a feeling the 4 rides are a much better planned out venture than we first anticipated, rather than this video is being some last minute marketing of a bodge job hiring of some fun fair rides. Last year was the 40th anniversary of the corkscrew and the blade arriving in 1980 and with the year we had there was no opportunity for a real celebration, so I think this year they're making the most of it. Plus, both of those rides are featured in the beginning of the animation! Perhaps, instead of themeing the temporary rides, there will be some (minor) themeing around the park in an 80s style? Might seem silly but worth thinking about since they've made this effort of advertising the new rides.
Point is, this is a sign of even more exciting stuff to come