As well as the Sony A7c II (buy here), Sony has also announced the new Sony A7cr (buy here) mirrorless camera. This is a higher resolution camera, offering a feature set similar to the Sony A7R V (buy here) in the smaller form factor.
Not so much a successor to the A7c but expanding out the range of cameras that utilise this form factor, the A7cr is designed for users that want high resolution. There is some bad news, though. It doesn’t feature the A7R V’s 8K video features.