It seems a design study was conducted in 2017 for trying to fit a quad pack of smaller hot launched missiles into a naval cold launch set up.
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The smaller hot launch missiles are the SAMs & the cold launch set up it like the Brahmos VLS or the upcoming UVLMs set up. The quad pack has a hot gas routing system at the bottom attached to it. In the pic above the gas can is shown in white colour. There are white coloured tubes rising up along side the launch cannisters. These tubes will re-route the hot gasses upwards when the missile is fires.
The tubes rising up seem quite thin. This type of quad packing will be restricted to smaller SAMs, so I guess there won't be a lot of gas to route up anyway. Also there are space & weight constraints so that might have played a role. You can also see coiled springs below the gas can. The springs are probably for damping the recoil force. The platform below the springs is a part of the cold launch set up. This is where all the launch tubes rests.
It is just a design study so there is no certainty of this being used. We might still end up with 2 separate launchers: a cold launch set up for AShMs/LACMs/heavy SAMs & a hot launch set up for tactical SAMs like Barak8/VL-SRSAM. I am not even sure if this is their own design or are they studying some foreign design.
But at least they are studying the possibility of quad packing tactical SAMs. So the probability of the DRDO's UVLMs being a truly universal VLS is high.