Also like many spinoffs for example NGARM airframe derived from Astra. Prahar was also derived from AAD missile, saves a lot of things to do. Interestingly and maybe a lot of you know that the QRs were changed at the end of the project. From a personal PoV and opinion, the bastards didn't even knew what they wanted, this was when the project was not delayed. Alas such is the story of many projects but we plebs should not question the IA and it's right to do whatever it wants, where is th CAG like institute for that huh.
So that's the story why we saw this new poster
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Also, Pralay as noticed has been heavily derived from K15 shaurya and understandably as the quasi ballistic design was validated then and no need to do the same work again for a new design.
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After setup of Rocket forces, for a layman it is clear enough that a 500km class TBM won't be enough against China and sooner or later 1000km class TBMs would be required. As you can see on map we do need longer range for striking in China's deep while opposite is not true.
Therefore Next logical step would be to do what Soviets intended to do with their SS-23 spider missiles. First variant was with a separable warhead, with enhanced survivability against AD threats and the possibility of range extension through skip trajectory. Second one was the Volga missile in mid, basically a two stage SS-23 missile with 1000km range. The idea is very neat and one which can achieve economies of scale.
One could only imagine just how many missiles would we need against a long conflict against China or Pakistan when even Ukraine has shown that 1k missiles are not enough and Russia has to rely on Shahed poor man's cruise missile which has a merit of it's own but still no one would have thought that Russia would be importing weapons that too in mid of war, if you ask me even a 5k number missile with us will look small.