#2 To give progression to their respective feuds
It's no secret that the WWE also wanted to give advancement to their TV shows on the Tribute to the Troops show and thus, paired up superstars from the top storylines of both the shows to do so. AJ Styles and the new Daniel Bryan have been feuding over the WWE Championship since November while Dean Ambrose and Seth Rollins have been a part of a heated rivalry since the exit of Roman Reigns.
We have seen several 'challengers vs champions' matches in WWE history which often sees the team of the challengers win the match against the heel champions. WWE had earlier used this formula on the last episode of SmackDown before the brand split which saw Zack Ryder and Darren Young defeat the team of the Miz (IC Champion) and Rusev (US Champion).