Hi @DeadSkully-X,
You can change it, it should automatically assume the name.
The past name will be added into your list, you can have up to 5 Screen name.
Always you can choose a Screen name from your "own 5 Screen name". I know it's all complicated, but it works so
If there any problems, ask after the holidays a game advisor.
Here's a detailed guide on how you manages Spore Screen Name
http://forum.spore.com/jforum/posts/list/56537.page
http://answers.ea.com/t5/Spore/Spore-screen-names-adding-and-deleting/td-p/3241493
You can try it on Live Chat, or phone
http://answers.ea.com/t5/Answer-HQ/How-to-contact-a-Game-Advisor-using-the-new-EA-Help-page/m-p/2161...
1 Click the following link: https://help.ea.com/en/spore/spore/
2. Make sure you are logged in with your Origin ID
3. Choose your country (take a look right side upper navigation groin)
4. Press the orange button below right side "Contact us"
5. Follow the steps
Hope this will help!