madrid never have to sell to buy, given their revenue. they will never be in danger of violating FFP. they only sell players because they can only keep so many players in the squad.
personally, i think they will keep bale for at least one more season. i think the plan will be to play reus at LW, ronaldo at striker, and bale at RW. benzema has been "on the way out" there since he signed. i could see him being the one to go first.
i think its a near certainty they will sign de gea. they can pay £20m for reus, £30m for de gea, and £80m for pogba without blinking.
the united stuff is interesting to me. what was their net spend this past summer? £100m? and they are going to spend another £100m+ this summer if you believe the papers. their revenues, like madrid, are through the roof. you almost have to wonder why they didn't spend this heavily during the last few years of the red nose era. it might have left the squad in better shape.