Complete the first save file to 100% first, complete every other trophy before starting the ng+ file. Reason being is that it'll only carry over what you've done from the moment the ng+ is created. If you create the file then go back to complete the main game/DLCs to 100%, you'll won't have the unlocks from going back. Learnt this the hard way and didn't have the suits unlocked when going back on my original ng+ creation, had to create a new ng+ to have everything :)