Unless they were interrupted. Tony had to rely on the hope that they wouldn't fire missiles when Iron Man was within the blast range-- they weren't that desperate, were they? Even if they didn't appreciate Tony crashing their parties, they appreciated the golden egg, and they must have appreciated Iron Man enough to try to avoid nuking him. There would at least be some irritating enough backlash to make them think twice. Iron Man had fans.
At the first mention of 'readying', Iron Man was darting back towards the battle zone, numbed out and ready to finish this with Bruce alive, even if it ended with him dead. "Keep your boys on a leash, Nick," he demanded hoarsely, blanketing the SHIELD comm link. He hit the ground hard, throwing up dust in front of the reeling Hulk, making the beast snap into focus and snarl at him.
"They're up there, dude. S.H.I.E.L.D., you see 'em?" Iron Man called out to him, pointing at the news helicopter circling above. It was easy bait, and the Hulk threw his head back puzzling over this conundrum. Exposing his neck. "Good boy," Iron Man muttered, snapping his arm up to launch the adamantium-tipped injectors straight into the pulsing vein. Time to prove his late arrival worth the wait.
Roaring in protest, surprise and unadulterated rage, the Hulks focus was back on Iron Man, swiping at the needles protruding from his neck to send them tinkling to the broken stone at his feet. "Metal man think he can trick Hulk?" he growled, taking his first heavy step towards the offender, who just held his ground. Praying. The Hulk's fists were balled and his teeth bared, good eye wide and pupil blown black, and the second step never came. He teetered, and made a low growl in his throat, and that rage tripled in his eye, but he remained frozen.
Not here to waste time, Iron Man was in the air then grabbing onto the Hulk's sparse hair, heels digging into his collar bone to steady him, one hand raised as if ready to punch the remaining eye out. Instead, there was just a pinpoint beam of light from Iron Man's wrist, barely bright enough to be seen around the shadow Iron Man cast, targeted directly into the Hulk's frozen, watching eye.
They toppled together. Iron Man, kneeling on the Hulk's shoulders, leaning over with his hands buried in the rubble on either side of his head, gasped through shaky, fretful breaths, "Electroshock. I hear it's in season." By then, the Hulk wasn't so bulky, and Iron Man was rolling away, dragging himself out of the rubble where Bruce Banner lay, broken and battered but quiet. He shouldn't have been able to fall like that. Too relaxed, too even. The paralyzer wore off way too fast. Iron Man could have been Hulk food.