Source: mycomicshop.com

9. The Blockbuster Invasion of Gotham City

Detective Comics # 345 (1966)

While exploring a strange Island off the coast of Gotham, Bruce Wayne rescues a young Mark Desmond from quicksand. He drops the boy off with his older brother Roland Desmond and goes back home. Soon after, he and Robin begin hearing about a series of robberies carried out by a Hulk-like monster called Blockbuster. The dynamic duo seek him out and try in vain to fight him, with little to no success.

They trace him back to the island from the beginning and realize that the monster is actually Mark Desmond, operating under orders from Roland. Batman changes back into Bruce Wayne and uses Mark's debt of gratitude to him to make Blockbuster stop attacking. Meanwhile Robin knocks out Roland.

They take Roland to jail, but when they return for Blockbuster, he's gone, to return eventually.

One of the Greatest Batman Stories of All Time: No. I will say that the Infantino art is very good but the story is pedestrian and boring and the character beats are underwritten. It's not, like terrible, but it's fairly average.