Didn’t Receive the Darth Nihilus Portrait

Hey man! They retired certain of the portraits when new content was released. Similar to how you might be able to get a portait for a certain character during its release, but can’t get it later if you missed that opportunity. Here’s a similar post from before where someone had a similar issue to yours. There’s a little bit of explanation there as well. I believe the information is still current. Hope this helps: 

I did not receive the portrait of Darth Nihilus | EA Forums - 12073967