According to Overwatch reporter Arran 'Halo' Brown, the Overwatch League logos have been leaked via the leagues mobile app.
"The OWL league app seems to have once again accidentally leaked something. This time it’s the branding for 5 of the 6 we didn’t know about. Paris and Chengdu’s logos look pretty good, Washingtons, Guangzhou& Hangzhou on the other hand..."
The logos can be seen here:
The team names that haven't yet been previously revealed are:
- Chengdu Hunters
- Hangzhou Spark
- Paris Eternal
- Washington Justice
- Guangzhou Charge
Please note this is just speculation, and not proven legitimate by any official sources.