I have one idea, so bear with me here:
The flaming Smash symbol shows up per usual, and we see a couple of shots of a large grassy clearing. We later see Wario riding on his motorcycle with a big bag of nothing but gold. He notices a large bag of gold sitting in the middle of the clearing. Noticing that no one's around to claim it, with a greedy look in his eyes, he gets ready to take it up and take off. We then hear a rustling in the bushes, complete with a red streak dashing out to ambush Wario with a myriad of weapons. In the end, the ambush results in Wario getting sent flying and landing on the ground, HARD. Face down in the dirt, we see the red streak's true identity: A young, beautiful woman with red hair tied in a ponytail. That's right, the mysterious stranger is none other than Anna! After some gameplay footage, the usual SSB4 logo shows up. Anna then poses with her signature finger-on-the-lip coy look, stating to Wario: "Careful, love. Prices aren't the only things I can cut in half!" Anna then looks at her beautiful, shining reflection in a gold coin she got Wario's collection. Speaking of Wario, when it comes to money, as we all know, Wario is NEVER one to give up a fight that easily, not even to a woman. That being said, off of a small corner of the reflection of the gold coin Anna's holding, we see (and even hear!) Wario's stomach beginning to inflate! (If you've seen the E3 trailer for Super Smash Bros. Brawl, you already know where this is going.) BTW, Anna doesn't notice ANY of what Wario's doing until the last second, when notices a large golden glow appear from behind her...only to see the golden glow being produced...by Wario's buttocks! Obviously, Anna gains a MASSIVELY shocked/horrified expression on her face after seeing this, and then the screen abruptly switches to black. From there, we don't see anything, but we do hear a VERY loud farting noise.