According to the different German newspapers ("Hamburger Abendblatt", "Bild"), Thomas will be the moderator of Grand-Prix Party Countdown fuer Moskau May 16th 2009 and will present the results of the German votes (as he did in 2004):
https://www.abendblatt.de/daten/2009/04/03/1109993.html
https://www.bild.de/BILD/regional/hambur ... party.html