I doubt it, but it is possible. In the first war with the Old Ones, I believe the Necrontyr were pushed back to their home system, their colonies abandoned or destroyed. When they found the Death-C'tan on their home sun, and transferred it to a body, it demanded souls for its new hunger and subjugation. It took time to convince the C'tan that their were riper harvests outside of the system, and during that time, it ravaged the population.
They Necrons began preparing for a new war, more C'tan began to appear and transfer, and the Deceiver made the offer.
All I'm saying is that it is very unlikely, but then again the Old Ones survived somewhat, and I think that one or a group of said race are controlling the Tyranids for either vengence or to clean the galaxy.