If everything had gone according to plan, Enterprise would have been in Pearl Harbor at the time of the attack, arriving the day before. She would have been moored on the same side of Ford Island as the Utah. There's no doubt she would have been sunk, and being moored against the island like Utah, capsized would have been quite probable. When they made the attemps to right the Utah, they discovered the mud and slope of the island prevented the task. A ship as tall as Enterprise would have complicated matters more. The Utah was given up on because of the difficulties trying to roll her over. I've no doubt they would have moved heaven and earth getting the Enterprise back in action. Perhaps even the mother of all dredging and earth moving operations altering Ford Island itself, to get that precious flight deck back. So, consider the key engagements Enterprise participated in till 1944, which at best, is when she would have been back in the fleet, if at all.