Deletion of Outer Plane

Comment: to Planescape - The fictional concept is really only covered in-depth in primary sources.  The only non-primary sources are extremely brief or tangential mentions of them.  And, the majority of the content in the article is unsourced, in-universe  information.  I agree with the nom that the main Dungeons and Dragons article would be inappropriate to redirect/merge to.  However, the article on Planescape, the setting that dealt specifically on the planes of the D&D multiverse, ''does'' talk about the Outer Planes, so if anywhere, that would be the most logical place to serve as the redirect target
Stance: delete
Cited policy: Wikipedia:What Wikipedia is not (WP:PLOT)

Comment: or '''merge''' to Planescape per above comments since there are  to retain, per  and 
Stance: keep
Cited policy: Wikipedia:Reliable sources (WP:RS||WP:PRESERVE||WP:ATD)