[video=youtube;yYRM4nCMWCk]http://www.youtube.com/watch?v=yYRM4nCMWCk&feature=player_embedded[/video]
Although this is unconfirmed, thus we call it a rumor, this looks very plausible and comes from some good sources. The above video is supposedly the Samsung Nexus Prime boot animation running on a Droid Bionic. Judge for yourself.
Source: PrimeForums.com via DroidMatters