At the Summer Game Fest, they showed a new trailer for a major DLC for called cuphead The delicious last course. It featured a third playable character, the Golden Chalice.

In The Delicious Last Course, the cup, mug and golden cup attached to it await exciting adventures on a new island! The Golden Chalice’s new weapons, charms and superpowers are just what you need to take on an amazing cast of powerful bosses and help Chef Solonkin with his last, toughest meal change.
In the video you can see a new heroine, locations and bosses, as well as a battle with one of them. The add-on will be released on June 30, and Cuphead itself will be available on PC, PS4, Xbox One, and Nintendo Switch.
All screenshots from Cuphead: The Delicious Last Course can be viewed here.
Attention!
Source: VG Times