I've always liked this issue of Marvel Team-Up. Like a lot of this books' early run, it's a totally inconsequential piece of fluff that's guaranteed to raise a smile. Firstly, it's got Bird-Man, Ape-Man & Cat-Man, the lowest of low rent super-villains. How these saps ever had the cojones to call themselves something as tough and spooky sounding as The Unholy Trio is beyond me.
But also, as well as a beautifully solid and unshowy art job from Jim Mooney & Frank Giacoia, it's Len Wein just having fun with the characters. Spidey and DD here are like an old vaudeville act ( 'Boy, it sure took you long enough, Horn-Head' ' Guess you've taken care of everything, Web-Head' ) and the way they bounce off each other throughout the story is why it's one of my favourites. From the days when super-heroes liked being super-heroes.