FWIW Diablo 3 is now a worthy successor. It was terrible at launch, but the devs listened to the community and it's a great game now
My only complaint is it feels too easy most of the time, and I cannot make it harder until I beat the campaign once. My long experience playing D1 and then D2 are probably showing though :)
Go in expecting a decent game in that style though and you'll enjoy it a lot.