Deletion of Core worlds

Comment: no citations to |reliable sources. Use of the term across media is just a collection of trivia/plot summary. Unless someone cites a secondary source asserting the term across franchises has an underlying, common use, then it's just |original research to suggest the term in one franchise means the same/something similar in another
Stance: delete
Cited policy: Wikipedia:Reliable sources (WP:RS||WP:OR)