JS Bin// source https://jsbin.com/tekiruy/edit?js,console

jsbin.tekiruy.js

'use strict';

var promiseList = [function () {
  return Promise.resolve(2);
}, promiseGenerator(), promiseGenerator(), promiseGenerator(), promiseGenerator(), promiseGenerator()];

function promiseGenerator() {
  return function (val) {
    return new Promise(function (resolve, reject) {
      resolve(val * 2);
    });
  };
}

function promiseRecurser(list, val) {
  if (!list.length) return val;
  var nextPromise = list.shift();
  return nextPromise(val).then(function (val) {
    return promiseRecurser(list, val);
  });
}

promiseRecurser(promiseList).then(function (val) {
  console.log('last: ' + val);
});