From Cisco CCDE page, which can be found @ https://learningnetwork.cisco.com/community/certifications/ccde/syllabus?view=overview :
"There are no formal prerequisites for CCDE certification. Other professional
certifications or training courses are not required."
Just like the CCIE, the only prerequisite is the written exam for whichever track you are working on. Written exam + lab exam = certification.
The CCDA and CCDP are likely good things to go through for incremental preparation. And if you are already an expert, then they should be quite simple to go through!