Beamy deffgun - has this weapon ever appeared anywhere on TT or was it specifically made up for DoW2?

My understanding is that GW have very tight creative control over Relic when they were making DoW2, so much so that one of the Relic devs had to take out GW rep for many drinks to get the "drive me closer..." line in for Retribution. Does that mean GW specifically green lighted the idea of beamy deffgun? It would be awesome if it comes out in a new ork codex. God knows orks need something other than rokkits or the shitty tankbustas for AV.