For those of you who want to know, here's a list of possible players.

By the way, there's also a rumor from a credible person that "this player is actually well-known in the APAC scene, but nothing great, might surprise you."

Sscary
Evidence: Name rhymes with Ferrari (?), Berserx "accidentally" spoiled it, perfect fit for the role.
Doubt: Contradicts "well-known, but nothing great."

Dos9
Evidence: Obviously rhymes with nine.
Doubt: Dos9 isn't really well-known (?)

Honestly, I can't think of another name, free-agent controllers who are well-known but have had decent-to-mid performances this year.