It would certainly be a great thing if UE was to have a second try at this. Nothing on any of the public roadmap (https://portal.productboard.com/epicgames/) or references in WIP code that suggests this. Lets hope your friends are correct :P

I got the impression the HTML5 with WebGL platform was removed at least partly to minimize the scope of work with some of the large renderer changes Epic has made between 4.26 and 5. So now does seem like the right time for them to try to tackle the problem again.