As we all know, PSIV makes a habit of saying there is a thousand year cycle for Rykros to return, Dark Force to rise, and all that other good stuff. But is that really true?
We can tell that there's almost exactly a thousand years between PSII and PSIV, but less time lapses between PSI and PSII. It's more like 940 years. That's close to a thousand, but a 60 year difference is a major problem for Rykros' supposed purpose as a warning of the end coming.
There's also the concept that Lassic actually somehow summoned Dark Falz, starting the whole cycle of DF appearing. If that's true, how could the Great Light have known, millions of years ahead of time, to set Rykros to return just in time for the millennium mark? Or, do you think that there were other DFs prior to PSI and we haven't seen those?