The build to Worlds Collide picked up in the show-closing angle of NXT UK TakeOver: Blackpool II.
The Undisputed Era made a surprise appearance and attacked Imperium after WALTER retained his WWE United Kingdom Championship against Joe Coffey in the main event of the TakeOver show.
WALTER and his Imperium stablemates were in the ring posing when Undisputed Era ran in through the crowd and attacked them. Marcel Barthel, Fabian Aichner, and Alexander Wolfe were taken out. WALTER and Adam Cole going to go face-to-face, but Kyle O'Reilly, Bobby Fish, and Roderick Strong then surrounded WALTER.
Undisputed Era laid out WALTER, with Cole hitting him with the Last Shot before Undisputed Era posed as the show went off the air.
All four members of Undisputed Era will face all four members of Imperium in an eight-man tag match at the NXT vs. NXT UK Worlds Collide special that's taking place during Royal Rumble weekend. Worlds Collide is being held at the Toyota Center in Houston, Texas on Saturday, January 25 and will air live on the WWE Network.
NXT Women's Champion Rhea Ripley defending her title against Toni Storm and Finn Balor vs. Ilja Dragunov are the other matches that have been announced for Worlds Collide thus far.