if they unveil it as anti ballistic missile defense then no one will suspect until told otherwise , IRGC hasn't unveiled an air defense system for almost 6 years now its only logical for them to be working on something big much bigger then 3th of khordad. when IRGC unveil prototype for sevome khordad they were already working on Alam Al Hoda and a big missile called Sadid 630Usually such critical systems are not shown. I mean its a key system to break the U.S airpower kill-chain, by targeting the support aircrafts.
A main task of the IRGC-ASF to lessen the pressure on IRIAF and IRIADF.
Wonder where that info comes from.
could be, they also had Fateh family of ballistic missile in mind for that roll too