Who else has Messi, Suarez, Griezmann and Dembele? Nobody.
For a season, maybe two.
But altogether they are "only" 115 years old...
Dembele won't play, even if Neymar doesn't return, so probably you have too much optimistic trust in the elderly trio. Not to mention that Griezmann will be a flop on the left and playing without a winger, with three slowish attackers is not what your everybody "nobody" dreams about.
possibility of permanent damage in his foot
I love when folks start to worry about the health of a footballer, simply to add an element to their own agenda.
Just count Messi's injuries in 14 years, vomiting and the like and you will find that specially Neymar had much less injuries (excluding the attempt to brake his spine).
Come on guys, you are not serious (or just too many limbal-surgeons signed up for this forum)...
BTW, can't Barca include Valverde in the deal??? I'd gladly offer him for a million...