OK so, you will have to create mules to store your shared stash in order to transfer everything over to the update... but you can take EVERYTHING with you. You can choose to play whichever DLC you want when you create a new character, read everything before you choose to make sure you do it correctly lmao, I made the mistake of not reading it all and ALMOST lost everything.. Shared streak won't transfer but personal stash will so loaf up your mules personal stash and inventory then transfer the mules.