Hyperion DID NOT TURN HULK BACK INTO BANNER.
From Context Files: Hulk vol 2 by GhostRavage
Hulk forced to Banner by Hyperion
One of the few instance which don't posses that much context and is most of times misinterpreted because people don't pay much attention to the situation as a whole, say, they don't look at the big picture. Often the instance is showcased by posting these 2 scans from Hickman's Avengers #3 without the context behind...
So by the first look, Hulk is seemingly hit so hard by Hyperion he turns back to Banner. However, that an improbable possibility when the context is brought to light... Let's approach it shall we?
In Avengers #1 Hulk was Mind Controlled by Abyss , Ex-Nihilo's half part, which ended in her controlling him all the way to Avengers #3... The fact that even Hulk's purposes were being controlled by her means Hulk didn't even have his own reasons to be mad nor to fight. Which then brings us back to the scans posted previously.
The moment Thor freed himself and launched a huge lightning on Abyss she explicitly states "I've lost him" while possibly looking at Hulk. At the same moment Hyperion hits him and Banner appears inside a crater later on. Without the context it's understandable to think Hyperion knock Hulk down with a punch, but with it it's pretty obvious Hulk turned back to Banner because Banner had no idea why he was fighting anymore, he didn't have any reasons to be mad, let alone fight against his friend and the moment Abyss lost control over him, he instantly turned into Banner.
So no, Hulk went down that way because of the reasons stated above, not because Hyperion knocked him back to Banner.