#2 Become the new #1 contender for the WWE Championship
It is surprising that despite being one of the most popular superstars of the roster, Rusev has never held a world championship in WWE. He has been among the contenders on multiple occasions but his only singles pay-per-view match for the WWE title came at Extreme Rules 2018, where he challenged the champion AJ Styles. The Phenomenal One won the match and Rusev was demoted to the mid-card once again.
With the Beast in the Bank, Brock Lesnar, not expected to cash-in any soon, WWE can book a Rusev vs Kofi Kingston feud for the WWE Championship. This match can take place at WWE Extreme Rules as we would get some freshness in the WWE title picture.
The True American Hero Rusev will get a lot of momentum after this feud and then WWE can use him in non-title feuds or even secondary title feuds. If a returning Rusev wins the next #1 contender's match for the WWE Championship, it will also generate huge shock value.