On February 7, 2019, at the All Elite Wrestling Ticket Announcement held at the MGM Grand Pool Splash in Las Vegas, Nevada, Pentagón Jr. and Fénix made their first appearance with the company. As The Young Bucks were leaving the stage, The Lucha Brothers music played seeing the two teams face off before a brawl ensued with Pentagón striking Matt Jackson first, while Fénix took out Nick Jackson with a superkick. Pentagón then proceeded to hit Matt Jackson on the stage with a "Fear Factor", before announcing themselves for AEW's inaugural event, Double Or Nothing. Later on February 23, The Young Bucks made a surprise appearance in AAW Wrestling, attacking Lucha Brothers during their AAW Tag Team Championship defense, costing them to lose the match. The Young Bucks then challenged the brothers to a match at Double or Nothing, which was accepted. At AAA's Rey de Reyes, The Young Bucks defeated The Lucha Brothers for the AAA World Tag Team Championship. This subsequently turned their Double or Nothing match into a rematch for the championship, which The Young Bucks won.