Even if the news that he'd never found Steve was not what he wanted to hear, it was quickly eased into oblivion by the news the man was alive and had been found. And alive from before...
It was all starting to make some vague semblance of sense, if that was humanly possible to say, but Howard was thinking it. There was some sort of time vortex that was drawing in individuals, from different stages, and moments in their lives.
How much potential did that have for them to investigate and harness!
Howard's eyes were lighting up, the potential giving him something to think about rather than dwell on the impossibilities, because in Howard Stark's mind there was no such thing as impossibilities, only new potential that hadn't been investigated enough!
"Steve, Captain Rogers is here, and Steve from before we did the treatment? Amazing!"