Wanda's teleporting was definitely out, and Iron Man shook his head to agree at Steve's mention. If she couldn't get her team across the country, she definitely wasn't going to risk a port half way around the world, not to mention the energy she would need to get them back. That might leave them stranded, at the worst moment. Steve was wrong, though, about what Magneto might expect. He was too arrogant to believe they'd be coming after him, and Steve said why-- Magneto had all of the power, and the Avengers and the entire country, rest of the world, were running of fumes. That might have been the only play they had.
"We make it look like Pietro escaped, little pinch," Iron Man said in the same breath, the only warning he gave before a needle suddenly punctured Steve's skin under the warmth of Iron Man's palm. Almost instantly the area went numb. "Minimize the damage," he finished. If Magneto was going to lash out then, they would know what he was coming for. "Pressure," was his next warning as he picked out the forceps from his table.