We had already 'signed' him, I doubt we can go back on that because of the injury. Very unfortunate situation for every party involved.
IIRC they had said 6 months out, so around December, which means january to start to pop up. Second half of the season absolutely to see him back in a match.
He would be our only actual DM, also useful in the center of a back 3 as well. Would be an useful player for rotations but who knows how difficult will be for him to recover form after this injury. He could be simply loaned out as soon as he recovers so he can play more and continue his career.
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Always followed him at every level since he was so present for club and (youth) country.
He captained the U21 team of Lorenzo Pellegrini, Chiesa, Zaniolo, Kean, Barella, Locatelli, Meret, etc. He generally had the more mature head.