We are migrating to a new customer support ticketing system (desk.com) and unfortunately while moving over our old tickets the new system (Zendesk) sent an auto reply to "new users". We weren't aware this would happen and so and email was sent out in error.
You do not need to create an account and you can ignore the email entirely.
You can find more info about this over on our forums here: https://forums.kleientertainment.com/forums/topic/110413-zendesk/
Sorry for the confusion
This is so so so so awesome! I seriously can't wait My wife will kill me if I don't ask, but is there any hope for cross-play between PS4 and Vita in the future? She was really bummed that she couldn't play her Vita progress on the big-screen