Async Tasks and Orchestrator

gulpfile.js

// I'm pretty sure this is a bad idea
setImmediate(function() {
  gulp.task('later', function() {
    gulp.src('**/*.txt')
    .pipe(gulp.dest('output/'))
  });
});

// but I really want to...
fs.readFile('some-other-tool.json', function(err, data) {
  // do stuff with json
  gulp.task('build', function() {
    gulp.src(myJson.glob)
    .pipe(gulp.dest(output));
  });
});

// so should I...
gulp.task('build', function(cb) {
  fs.readFile('crap-from-java.json', function(err, data) {
    // do stuff with json
    gulp.src(myJson.glob)
    .pipe(gulp.dest(output))
    .on('stop', cb); // <== would this work the way I think orchestrator does?
  });
});