CharlieMonster
Mongoose
Well, they couldn't call it 'Call of Cthulhu' as that would infringe Chaosium's Trademark, but given the antiquity of the Lovecraft material and lack of any evidence of copyright extension on any of his work, there's nothing to stop them from publishing a horror RPG that borrows heavily from the Mythos.
Arguably there is already pretty much an RQ version of Call of Cthulhu, it's called err... ...Call of Cthulhu. :?