Deletion of Intro sequence

Comment: I agree, with my same rationale: there are intro sequences, but without |reliable sources writing about them, this is just . A quick search on the custom /RS https://cse.google.com/cse/home?cx=003516479746865699832:leawcwkqifq search engine brings up some results, but nothing in-depth about the actual concept. Notable intro sequences can be mentioned at its respective game
Stance: delete
Cited policy: Wikipedia:Reliable sources (WP:RS||WP:OR||WP:VG)