If we're on a fairly level playing field about Hazard, we can assume these things from a Man Utd perspective: Fergie wants him. We've offered Lille enough money (£32m~) and offered the player a lucrative enough deal.
The past season (and probably longer) we've moved more towards a 4-2-3-1 of sorts, but it's always reported as a 4-4-2.
We look like this (with people fit) -
-------------De Gea---------------
Rafael - Vidic - Ferdinand - Evra
------------------------------------
---------Carrick - Whoever-------
------------------------------------
Valencia ---- Rooney ------ Nani/Young
------------------------------------
------- Welbeck/Hernandez------
Rooney often drops behind the other striker and plays anywhere between central midfield, attacking midfield and as a striker.
As Rooney is our best striker (and the others aren't great compared), he needs to be told to play as a striker and stay up front, he could easily go into the position of Welbeck/Hernandez and Hazard can sit behind him. Kagawa could do this too.
Nani, Young and Valencia can be rotated based on form, injuries, etc.
That central midfield position is still a concern, and we need someone to go alongside Carrick. We have quite a few people who can play CM but perhaps we could sign someone fairly cheap too?
So, hopefully Fergie will agree with me

o) and explain to Hazard that he'll be playing in behind Rooney, perhaps occasionally out wide but not often. I don't quite see how Chelsea can do this when they don't have a manager and we don't know how they will line up...? City can probably give him that role as well, but they've got plenty of attacking players!
Ps. sorry for the football 'managerness'.
