By Daniel Trotta (Reuters) -Like Batman forming the Justice League of superheroes, or Iron Man helping assemble the Avengers, comic book editor Scott Dunbier needed to put together a team of stars. The call went out and Dunbier quickly signed up the biggest names in the U.S. comic book industry to collaborate on a special anthology to raise money for Ukrainian war refugees. The result is “Comics for Ukraine: Sunflower Seeds,” a 96-page book produced by the best writers, artists, colorists, letterers, designers and editors that Dunbier could find. Proceeds, estimated to reach $200,000 to $500,0…