Uh... no. My theory is Hulk will be overwhelmed at some point & not be able to tell Ultron/the Vision from Tony (He is kinda like a kid when Hulked out, after all...)

It is a common theme with the Avengers - they face a threat, nearly get beaten, Hulk freaks out, eliminates the threat... and then the Avengers spend a good chunk of time after that trying to take down the Hulk. Because Hulk becomes stronger the angrier he gets, to beat truly powerful foes he has to get REALLY angry. Which means he is still really wound up after a really hard fight.
In fact, this type of string of events led to the "Planet Hulk" and subsequent "World War Hulk" comic series. Earth's heroes realized Hulk was just too unstable and destructive to leave on Earth, so they tricked him into being sent out into space, far away from any harm. Of course, he winds up landing on a war-torn planet, takes it over and then leads an all-out assault on Earth seeking revenge. Given that Marvel seems to have zero idea what to do with Hulk, an adaptation of this might be an applicable solution to keep his story going and possibly presenting something bigger than Thanos once Infinity War is over.