Neal Adams is amazing.
Frank Miller’s “the Dark Knight Returns” changed DC comics, and comics in general for that matter. Frank Miller has repeatedly stated that his take on an older, angrier Bruce Wayne was very much so based on the Batman characterization that was established in Dennis O’Neil and Neal Adams seminal tenure as the creative team on the World’s Greatest Detective.
And if you can’t see a connection between this artwork and the work of just about everyone that came into the business having grown up on Neal Adams comics, then… Well, keep looking.
Dennis O’Neil wrote Batman in the same way that Chris Claremont wrote the X-Men. It went on for decades, and mostly it was great in the beginning, pretty good in the later years, and kinda lame at the end. Read the Neal Adams Batman Archives. Just… Just read them.
Ra’s Al Ghul and the League of Assassins were established as villains in this era. The Joker became genuinely evil instead of the mischief he got up to on the TV shown. “The Laughing Fish” is still one of the best Batman books out there.
That Splash page of the Vision and the Captain America is from Avengers # 93: right at the beginning of the Kree/Skrull War. Neal Adams is one of the most influential creators out there. He brought realism and action movies to comics.
The Laughing Fish was by Steve Englehart, Marshall Rogers, and Terry Austin, part of their memorable run in Detective Comics that featured Bruce Wayne love interest Silver St. Cloud, corrupt politician Rupert Thorne, and the ghost of Hugo Strange. Besides the Joker story, they also introduced the modern incarnation of Deadshot and made Penguin kind of badass. Those stories definitely built on the Adams-O’Neil reinvention of Batman, but they have a cool vibe all their own.