I'm really surprised Newcastle are actually interested in any young prospects, both now and if they stay up.
They need players to make an immediate impact to help them stay up.
If they do stay up why wait to see if a young player can make it. If you can afford to buy peak ready players they do it.
That's not to say they can buy the best of the best straight away. They will need to go through many squads as stepping stones (like Man City did).
I expect them to take the best of the rest and overpay. James Ward Prowse, Tarkowski, Zaha, Trossard, Dennis, and that sort of level.
Added with a sprinkle of expensive gambles - Hazard, Ramsey, Icardi, Martial.