Reached for comment, a spokesperson for DC Comics gave the official reason for the switch as follows:
“This fill in issue contains a lost classic, Lost Boy: A Tale of Krypto the Superdog, set shortly after Superboy died in Infinite Crisis and Superman went missing.
DC Comics determined that the previously solicited story did not work within the ‘Grounded’ storyline. However, Chris Roberson, will be back for the final two issues of Superman’s year long walk across America. As we near the conclusion, catch up with Superman next month as he makes stops in Portland and Newberg, OR.”
The statement that it “doesn’t work within ‘Grounded'” is vague enough to raise questions all by itself, because — fittingly enough for a series about Superman walking across America — that story has been all over the map in terms of tone. That’s to be expected with a story that has two writers as different as J. Michael Straczynski and Chris Roberson (and a third if you count the fill-ins G. Willow Wilson did before Straczynski’s official departure), but there’s no getting around it. In the past year’s worth of Superman comics, we’ve seen stories about Superman smugly lecturing passers-by about Thoreau, burning down drug dealers’ houses with his heat vision, helping space aliens build a factory to revitalize the economy, visiting the extradimensional headquarters of a team of Superman-inspired heroes from the future and fighting an army in Tibet with Batman.
– From “Why Did DC Cancel Superman’s Team-Up with a Muslim Hero?” by Chris Sims, June 22