In order, DR Br. 50, Br.52, Br.50.35, DB Br.23 (x2!), DRG Br.50, DR Br.52, DB Br.64....and some brown diesel thing.
The "Plandampf" events are quite tightly timed, and it costs a load of money to have engines certified for that type of work.
It couldn't really happen in Britain, as the service timetables are so tight that there's no real room for giving a day to steam-hauled services, and that's before you go into the money and equipment required for mainline certification. Notwork Fail and the regular TOCs probably regard steam specials as a nuisance.