No.
There are no secrets from at least past ten years becouse most of the old Cold War research are declassified, on both sides.
Fact that Russians create composity integrated aerospace defense network was a thing back in the 80s, where doctrinal requirements were formulated and research and testing started. The same was going for alliance level IADS integration. ABM and A-SAT organic capability for ground based systems was considered vital necesity since the late 80s.
S-500 is a net centric system similar to the AEGIS, but instead being placed in one warship it is distributed on many mobile platforms where launchers can be armed with variety of different effectors. So ypu basically have land version of distributed lethality concept.
Hook it into the milnet and BMS, feed inforamtion from every other platform, weapon carrier, sensor or even effector and you have a A2/AD "bubble" that basically zones out the defended area, for long enough to plow with tanks potential opposition, with impunity almost.