Yeah. It sounds weird, but it actually served a purpose.
Carrillo and Andrade furthered their feud, and Almas finally got some good heat. He doesn't need to challenge Rey for that.
After Humberto got stretchered out and Mysterio chased Andrade, Seth, steel pipe in hand, appeared with the AOP, and the tag team beat down the champ. Seth made some remarks about leading by example and etc, and that Rey owed him one. Then curbstomped him.
Afterwards, backstage, he challenged Rey for the title, and Rey later accepted.
Some may question "but why the fuck even do a gauntlet match then?" and I answer by running away