An idea came to me when I browsed the EX section of the site a while back, and I notice this: all of the EX articles are written from the point of view of the current Foundation. Since the EX are easily the most tale-like of the lot, I think an EX could be written from the point of view of the Foundation sometimes in the future. The SCP would then not really need something resembling real life explanation, only a fictional one.
Specifically, I want to write something from the point of view of a Foundation irreversibly influenced, even corrupted, by the SCP in question. Because the Foundation is so thoroughly influenced, it no longer considers the SCP as something abnormal, and dismiss it as a natural part of the world. The article might then go on to chronicle the events following the Foundation's corruption.
It's not an easy idea to pull off, I realize, but it sounds like something that might be interesting to explore.