Rowan could accomplish many things at that stretch of time, much less the Primordial of Time himself, and among the many things this Primordial might have done in the brief moment of his appearance, Rowan had just discovered one of them; he was trying to revitalize his Bloodline Source. The purpose of this was unknown, but if Primordial Time was allowed to succeed in his return, Reality as it was known would be over.
'Is this what it means? To be an Eclipsed Creator. There must be a reason why I am always in the right places to stop events that could unravel reality. Ah, Destiny, perhaps I am seeing what this dimension is all about.'