Saturday 29th will be the second time the A380 visits Germany. Some newspapers and the local spotter community (links at the end of this post) reported that the A380 will arrive at 09.00 am for tests regarding dispatch and the "overall airport capability".
The RMAS (Rhein-Main-Aviation-Society) website says that position E9 is reserved for the big Bus, and that the visitor terraces may be closed due to the limited capacity.
Some links (sorry, couldn't find links in english, so german language only):
Frankfurter Rundschau
RMAS