The OW fares (or even a "cheap" R/T) from FLR to MUC are quite high (right now) so the discounted night train seems nice to travel as well as sleep. Can one look up online arrivals for German trains? Don't think it can be 1,000 km if the train does the trip in 10 hours? Didn't think they were that fast.
At any rate, a 2 hour delay is acceptable to us. Would still give us plenty of time to get the S-Bahn to MUC from Muenchen Hbf.