It is already called ECMAScript; they do not need to change it. It is also called JavaScript. (I don't know if there is trademark issues with ECMA too though)
However, the name "JavaScript" (and "ECMAScript") is in use enough anyways (like is described in the article), so Oracle shouldn't properly restrict others to use it in this way.
I mean, I don't think of it as a rebuke of JavaScript. I've just found it to be the most natural pronunciation for that sequence of letters. I really can't read it any other way.
I'd like to believe that most people have switched over to TS but I wouldn't count on it until I've seen the numbers, which I am currently too lazy to look up.
"We're now firmly in the TypeScript era. 67% of respondents stated they write more TypeScript than JavaScript code – while the single largest group consisted of people who only write TypeScript."