The Kree Giant Man was based off of Hank Pym? Atlas doesn't have the same powers as Hank Pym. First he was given an ionic treatment, giving him superhuman strength and durability. Then he recieved the pym particles. As he grows in height, his strength and durability proportionatly grows. At full height, Pym is usually around 50 tons, any higher, and he loses strength, as he has to focus more on just keeping his mass together. Because he's a crazy bastard, and because of his ionic treatment, they never discovered Atlas' true height maximum, but his strength, when he grew, could go beyond class 100.
Then he lost his ionic power, and pym particles. But was given more pym particles. Because of the previous mixture of the two substances in his body, his body was still tonned to have more strength as he grew. Then he lost the pym particles again.
But recently, when he got really pissed, dormant ionic energies surged in his body, he grew, and was stronger than ever. We haven't seen him do that much, by virtue of there's a large cast of characters, and T-bolts is only on issue 6, but he did pick up a massive chunk of the Brooklyn bridge, and throw it a quarter of a mile, to take down a Hydra air-carrier, while tons of skimmer jets flew around blasting at him.
when the wrecking crew were Asgardian powered Thunderball cracked Atlas in the jaw with his wrecking ball, Atlas almost drowned (as he landed in water) and when he got up he was so uber-pissed-off that he grew to heights he's never reached before (and he grew to 200 feet during "Acts of Vengeance"😉 and knocked out bulldozer with one punch..... also sent him flying about 2 miles
Yes. The one at Onslaught is Hank Pym.
I don't think Atlas ever went by the name Giant Man, though I'm not sure. I know he was Power Man for awhile, then Goliath, then Smuggler when he lost his growth, now he's Atlas.
At human size, I couldn't tell you what strength he is, as it's changed. Originally, I believe he was a match for Wonder Man. Then it started to fluctuate. At the start of the T-Bolts, he was probably around class 10-20 human size, and bullet proof. As he grew, his strength proportionatly increased, as did his skin's durability.
Then he lost his human size super strength, but the conditioning from all his years of mixed super strength and growth still gave him the super strength when he grew.
Now he doesn't have Pym Particles, and his Ionic energy seems to trigger both strength and growth, but we haven't seen enough of this new development yet to accuratly say if he has any human size powers. We've just been told that he's stronger than ever, though we haven't seen him do much at human size yet. He's also become mentally unhinged....