My bet would be on "like a new signing". In truth I think hes still capable of doing a job for us. He's not that old and he used to be tidy. Yes frustrating but he'd produce something 1-2 a game. Covered the fullback well too. ... at the level we're at right now i'd take back a fully fit motivated and grafting Jonas of 2011/2.
I reckon he'll go out on loan again, as I don't think the hierarchy will want to trigger the clause that means he gets a 1 year contract extension.
Loaned or free transfer. His legs have gone to an extent and he's probably not up to Premier League level anymore.
If he plays for us again then automatic one year extention to his contract. ( At least that's what printed by those in the know )