Grell's

As I understand it, Mike Grell's Warlord started off outside the regular DC universe.

Dead and loving it: DC Comics Solicitations for August, 2009 | Robot 6 @ Comic Book Resources – Covering Comic Book News and Entertainment 2009

Grell's script is just on the good side of being expository, but it is a first issue and there's a lot of ground to cover.

What Are You Reading? | Robot 6 @ Comic Book Resources – Covering Comic Book News and Entertainment 2009

Now, Ninja Cow, a fairly young Black Angus, is starting to calm down in Mr. Grell's small pasture.

'Ninja Cow' Had an Excuse for Udderly Unbovine Behavior Joe Barrett 2011

After the title's cancellation and Firsts ceasing operations, the character made occasional cameo appearances in some of Grell's other titles over the years.

1980's Flashback: Jon Sable, Freelance Chuck Wells 2009

Grell's art--while nowhere near what he would achieve later on--is also solid.

Archive 2009-02-01 rob! 2009

Grell's art--while nowhere near what he would achieve later on--is also solid.

Adventure Comics #435 - Oct. 1974 rob! 2009

After the title's cancellation and Firsts ceasing operations, the character made occasional cameo appearances in some of Grell's other titles over the years.

Archive 2009-12-01 Chuck Wells 2009

In fact, if you re-read Grell's Green Arrow, for most of the run, he goes far out of his way to avoid talking about anything fantastical at all.

Comic Book Urban Legends Revealed #150 | Comics Should Be Good! @ Comic Book Resources 2008

Anyhow, according to Grell's Wikipedia page, "in none of Mike Grell's Green Arrow stories is the character ever called "Green Arrow" anywhere but on the cover."

Comic Book Urban Legends Revealed #150 | Comics Should Be Good! @ Comic Book Resources 2008

Just Grell's response to the people that complained that "Ollie and Travis look too much alike", "All Grell's heroes look alike."

Comic Book Urban Legends Revealed #150 | Comics Should Be Good! @ Comic Book Resources 2008