Looking at the current squad re senior players, if we go off the CL squad, plus the injured players, it leaves Bony & Nasri as the only 'fit' senior players not included. Yaya was in the squad but didn't travel. Perhaps that is an indication of where we were up to at the time.
If rumours are true that both Nasri & Bony are talking to other clubs, then from what I can see, if they are going, that would mean the squad all fits as of today. We would have 17 for the 'free' places, including Kelechi & Sane, plus 4 in the homegrown spaces. (plus Denayer as club trained)
But then as soon as Bravo arrives, we are a player over the odds again for Champs League purposes. I suppose it would technically be possible to fit everyone in as far as the Premier League goes, but pretty daft to have 3 senior keepers plus Gunn. It is actually feasible Joe could stay & fight it out with the others though. Someone would have to drop out for Europe.
Edit: Doh, forgot Mangala.