I don't see the point in denying the reliance on plot contrivances when it comes to more recent story developments.
To introduce a brand-new even greater, more primordial power than the ones we've seen for decades now at this point in the story (where we're basically fresh out of primordial powers) can't be described as anything but contrived. Any attempt to justify this on grounds of "the Titans weren't teased all the way back in WC1 so it's the same thing" or similar hogwash is not only uncompelling but also misguided.