Considering the entry saying "As well as biological warfare agents, they also created creatures expressly for use in battle, and these remained effective even into the modern era." We could end up learning that the Guardians created the Thargoids, in order to battle the AIs.
It's a possibility. Of course, it's all total supposition and speculation [wacky]
Fun finding out though. If we do find out. My primary "worry" about the ancient ruins is that they were never intended to be anything other than the playground for solving Ram Tah's in game mission hunt, and we've all been expending a terrific amount of time and energy trying to solve something that just isn't there. Considering how quickly the ruins were found after the trailer was released (much faster than FD were expecting) they just weren't ready for people to be there and they've just been letting us all stew until Ram Tah's missions went live.
To be honest, I wouldn't put that past FDev.......................