The return of Nick Fury and Maria Hill would, at least in some part, signal the return of S.H.I.E.L.D. If S.H.I.E.L.
Numan Acar, who is expected to play the Chameleon in the upcoming Spider-Man: Far from Home sequel, may have accidentally confirmed that Cobie Smulders, who plays Maria Hill in the MCU, will be involved in the sequel in some capacity.
Feige has also made it known that the events of the next Avengers film will influence the plot of Far From Home significantly.
If the pair of characters are to return in Spider-Man: Far From Home after the events of the next Avengers movie, it can be assumed that S.H.I.E.L.