Black main screen, characters that I can not see in the gallery, infinite loading time

[MissAstrid-1850]

Im having the same problem, Blizzard give us a temporary solution:

PTR Bug where the game would stop loading after a certain point persists in Live

Hey there as a workaround if someone who is affected by this issue can add an additional command line argument to their Overwatch startup we want to see if this fixes the issue for you. Note this is an advanced startup line, you’ll want to clear this line after testing. Changing startup options can lead to odd problems. To set the command line, in the Blizzard Desktop client with Overwatch selected, choose Options > Game Settings. Find the Overwatch entry in the list, click the Additional comm…

but they are working on this problem, this is a temporary solution