If you’re willing to accept a little bit of extra syntax/ceremony, the `do` expressions proposal[1] is pretty much this (but it’s only stage 1 so who knows when/if it’ll land).
Since our goal is to be 99% compatible with ES we'll need to accommodate any proposals that become standard and pick up anything TC39 leaves on the table (rest parameters in any position, etc.)
1: https://github.com/tc39/proposal-do-expressions