I haven't seen this theory before, but it seems to make sense.
We know that Preservation 'took' some of Ruin's power, fashioning it into Atium, to prevent Ruin from completely destroying Preservation due to the difference in strength's. This power has to be in the Spiritual Realm (/some other place), because the power returns there when you burn the Atium, only to be coalesced anew. But what is stopping Ruin from simply taking the power from there? Clearly, Preservation has somehow changed the power itself, which forced Ruin to take the Atium itself.
My theory is this: Preservation took away a part of Ruin's Investiture and used it took fuel his own Futuresight. This had the side effect of that Investiture getting 'locked' in that format, perhaps with Preservation's power. Thus, when you burn it, you get futuresight.
This explains why Ruin could not simply absorb the Atium at a distance(Preservation's power repelled him), why Atium would grant futuresight and how Preservation could see so far into the future.
Some of the problems with this:
Atium is not related to the color red, which it might be if it is co-opted Investiture.
I am not sure whether Preservation can even pull this of with his Intent
It seems to be needlessly complicated