#3: Rusev Day was the most popular thing in WWE
WWE has a hard time with certain talent getting over. Even the very best like Seth Rollins had a hard time adjusting as a babyface and becoming a likeable personality.
Rusev and Aiden English, around Christmas last year, gave rise to astounding support from the WWE Universe. Rusev Day became the most popular thing in WWE, t-shirts were being sold like hot cakes, and things looked great for Rusev's career.
However, WWE failed to capitalize on this golden opportunity. Rusev featured in mega matches but failed to win on several occasions. He had a great showing in the Rumble match, entering first and lasting for a long time. He fought the Undertaker in Saudi Arabia and fought AJ Styles for the WWE Championship
Rusev is still crazy popular among the audiences with his Rusev Day gimmick, which means the US Championship will gain more prominence with his reign.