I'm not sure what he wants there's a lot of talk around Sancho but we've all been here before so I'm trying not to get to excited over it we've been here before with many players months of build up and done deal talk only for that player to rock up elsewhere. See Haaland.
My guess would be he'd like to return to England he's got some friends at Utd from the England squad he obviously knows Manchester but he is a London boy so a lot will depend on how he found life in Manchester.
However, if one of the big two in Spain came for him I think he'd probably go there first as even if it doesn't work out in Spain a move back to England is easy if he goes back to England that move out to Spain will be harder.
It seems pretty obvious that Utd are interested in him if they weren't I think they'd have distanced themselves from the rumours a while back. It will probably come down to how well Ole can sell him the plan it's not about being in the champions league it's about winning it if Ole can sell him the plan and vision that puts Utd back fighting for the PL and Champions League within 3 years then you might get him to come.
Utd are one of the few clubs that can or could afford him but Utd is still a hard sell it's a team that's been nowhere in terms of the big prizes for 7 years now and we have a manager without much of a track record so it's a gamble for a player.