Edmund McMillen revealed a few new cool features about his upcoming remake The Binding of Isaac: Rebirth today. He introduces a new item called the champion belt as well as some details of the champions themselves.
The champion belt is a store item that raises the appearance rate of enemies in rooms but this also increases their damage output. The store will also include additional but optional items so that players will be given a variety of options with regards to their play style. This information promises to add more complexity to how the game can be played.
Rebirth will also feature a large number of uniquely-designed champions that come with their own specific stats, features, and item drops.
Overall, Binding of Isaac: Rebirth seems to be coming together quite well, though McMillen has yet to inform the public of a potential release date.