Today, the Buffalo Sabres officially announced that they will return to royal blue next season. The logo and uniforms will all have a more modernized version of the original branding first used 50 years ago.
The Golden Knights have played three seasons, on three different center ice designs. Two of them are quite nice, while the inaugural season was a bit underwhelming.
The Senators have talked about rebranding for a couple seasons now, and it appears that they have no ability to keep a secret. A new logo has leaked over the past month, and it is widely speculated that it is in fact the Senators' new brand. It is basically the same as the Senators original logo but with a couple slight variants.