If you don't want to restart (to try a different character, or see the changes to the D2:ED section), in DKS and the Developer's Cut releases, you can create a new level 35 character at the beginning of the Flames of Vengeance section of the game. In that case you wouldn't have the same equipment (you'd be upgrading fairly soon, anyway), and the battle tower servants would be chosen randomly (there are alternates in Aleroth), but you could keep the same build and customization options as your original character.
