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In page Royal Rumble (2007):

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After The Undertaker made his choice on February 5, Shawn Michaels, Edge, and Randy Orton all wanted to face Cena for his title at WrestleMania. A Triple Threat match was made between the three for the title shot, which Michaels won after pinning Orton.[4] Cena successfully retained his title against Michaels at WrestleMania.[7] They continued to feud over the title with the addition of Orton and Edge, but Cena remained champion. Soon after the Royal Rumble, Umaga and Bobby Lashley joined the feud between Mr. McMahon and Donald Trump in the "Battle of the Billionaires" as their representatives respectively for the Hair vs. Hair match at WrestleMania.[8]