Alex Pereira gets middleweight title shot after just 3 UFC wins.
Pereira moves up to light heavyweight, beats Jan Blachowicz by split decision.
Social media controversy over whether Blachowicz had a better fight.
Pereira's win elevates him as a top contender in light heavyweight.
Division lacks a stable champion since Jon Jones' reign.
Pereira is determined to fight anyone for the belt.
He previously defeated Israel Adesanya in a middleweight bout.
Pereira lost the belt in a KO rematch with Adesanya.
Instead of a trilogy, Pereira moves up to light heavyweight.