Source: The Wrestling Observer Newsletter
At one point, WWE was planning on having Brock Lesnar return for a brief feud
over the WWE World Heavyweight Championship with The Big Show. Apparently, that
is no longer in the plans and will not be happening.
Lesnar is not scheduled to make his return to WWE until January to begin
promoting his Royal Rumble title defense, which is expected to be against John
Cena.
It’s been reported that Cena may face Rusev at WrestleMania 31 next year, so
the belief is that if they wanted to, WWE could have Rusev cost Cena his match
with Lesnar at the Rumble, setting up Cena-Rusev at WrestleMania.