The Colóns
In late 2008 through early 2009, then-WWE Tag Team Champions The Colóns (Carlito and Primo) engaged in rivalry with then-World Tag Team Champions John Morrison and The Miz, with the two teams exchanging victories in non-title matches and retaining their respective titles against each other. On the March 17 episode of "ECW on Syfy", it was announced that at WrestleMania 25, both teams would defend their titles against each other and the winning team would hold both titles. The Colóns defeated Morrison and Miz, and thus unified the titles into the "Unified WWE Tag Team Championship", although both championships remained independently active.