Being the latest instalment of our reasonably in-depth examination of DC One Million, Grant Morrison's epic transtime JLA tie-in of 1998.  So far we have followed the central storyline of attacks on civilization in two eras masterminded by Solaris the Tyrant Sun, aided and abetted by Vandal Savage.  We've seen how these were thwarted  (and in the best time-travelling tradition, caused too) by the…