serenewarfare
Banned
Putting aside talk of whether he's good enough to go up for not, Rusev was working house shows from before Royal Rumble and he's still yet to wrestle a match on the main roster. If Bo was getting even a hint of a call up we'd know about it.
Not every talent is brought up that way though. Shield debuted out of nowhere. Wyatts had a few weeks of vignettes but didn't work house shows. There's no one way that guys are brought up. And plus, Bo has worked on the main roster before, both on TV and house shows. So in that sense he is a known quantity to management. Rusev not so much.