In 2014, LEGO released 1 Duplo Superman sets, all of these sets have been retired.
1 set

10543 Superman Rescue

Theme / Subtheme Duplo / Superman
Year 2014
Pieces / Duplo figures 19 / 1
Availability Retired
10543 LEGO Duplo Superman Rescue
Retail $19.99
Value $32.20
Growth  +61.1%
Annual growth 5.1%