Tony wasn't terrified of the chaos going on around him. He'd seen much worse over the years. He'd taken time to research their foe, and he'd seen the same weakness that Captain America had noticed, which lead him into boosting a few things in his armor. He wasn't what all Apocalypse would be capable of in this world, but the least they could do was prepare for anything plausible.
Iron Man flew to their rendezvous point at the Hearst Building, expecting a much bigger team than what he saw as he entered. He was honestly disappointed in what he saw, though Spider-man was a welcome addition. "What do we know?" he asked as he took off his faceplate.