The editorial credits page credits the cover as a Matt Wagner painting, but that is an erroneous carry-over from the hardcover edition.
Half-title page, illustrated with a detail from the cover from Batman / Superman / Wonder Woman: Trinity (DC, 2003 series) #1.
Title page, illustrated with details from the cover from Batman / Superman / Wonder Woman: Trinity (DC, 2003 series) #2.
Illustrated with details from the cover from Batman / Superman / Wonder Woman: Trinity (DC, 2003 series) #1.
Covers of the issues published the same month the hardcover book came out.