Well that brick wall was only just made by
Universal Rocks* this summer so it won't be some permanent theming element covering it.
*Universal Rocks of course you can find out more about in this great interview by @Coaster Hipster if you haven't already seen it!
A temporary billboard, sign or screen until it opens would make the most sense.
I hope we are getting some new information (and not just a smaller version of the signs in front of the Wuze Wall if they are removed upon the completion of the facades there).
Although if we do get something though I wonder how they'll refer to F.L.Y. considering the whole trademarking issue is still unsolved?
Or could this possibly be an announcement for something else in the area? A second attraction? After all Raik was only announced for Klugheim in December 2015.
I think we can rule out the Rookburgh hotel rumours as its extremely unlikely one could fit in the current construction site.