I got a mental image of the Ridley trailer. The trailer would be done in a style similar to the Other M cinematics, and the start will resemble the cinematic where Samus is inspecting Pyrosphere, then Ridley rises from the lava much in the way of in Other M. Proceeds to roar to Samus similarly as in Other M, but you don't see him reflected next to her. Then you don't see Samus react like she did in Other M, but rather then notices his size, and Ridley stops roaring for a second. She begins to compare his new height to what she remembers him as, then he whips her with his tail, and he roars again. Newcomer Splash "insert catchy entrance phrase"
There is then in game footage of Ridley verses Samus, and then her ZSS version, and several other characters, with his theme playing. Gameplay ends with him eating the Mushroom item, that makes him roughly the same size as his canon Other M size. It then transitions to him holding Samus similarly to how he did in Other M, but before he delivers the finishing blow, someone comes to her rescue, but instead of Anthony, its "drum roll" Mewtwo.. Trailer ends, fanboys rejoice.