Shelvey comes back presumably at the bottom of the CM pecking order, having moved up a place in the absence of Lucas. I expect he'll be behind Adam, Henderson, Spearing & Gerrard when he comes back.
We're suddenly looking quite light in CM - how ironic, eh?? :P
I now expect us to be in the market for a CM in January, and if we sign him, Shelvey will be sent back off to Blackpool again for the rest of the season.