Midfield should look something like this:
Wilshere/Rooney
Only risk in playing Wilshere there is that he's largely untried in that position. He established himself as one of the best midfielders in the country last year playing as a box-to-box midfielder so it would seem more reasonable to play him there. However, he is naturally an attacking midfielder with excellent dribbling and passing ability. I personally think he should play as the furthest forward of the midfield three with Rooney in front of him. Rooney is an excellent striker and while he's also more than capable in playing in the hole, he should be played in his best position as he's undoubtedly England's best player.