Kind of too late now
Google spooked devs as soon as they started talking of separate runtimes and integration into Chrome. I'm sure many developers had flashbacks to the days of VBScript where Microsoft tried to fragment the web by shoving their own scripting language in their own browser.
Ironically Microsoft seems to be the winner this time around with Typescript. Typescript is a compiler that outputs JS but adds keywords for classes, static typing and modules. So it's familiar to JS (and Actionscript) devs while still adding useful functionality.
I don't rate JS or TS much as a language (binding and scope rules are a minefield) but sometimes pragmatism trumps idealism. TS has mature tools, thousands of definition files for calling popular JS libraries and has become a mainstay in many projects.