1 Man United manager Louis van Gaal is likely to be busy in the summer 1 Man United could once again look completely different next season.Funds for manager Louis van Gaal to turn the club into title challengers again are reportedly being gathered, so here are two possible starting line-ups for the 2015/16 campaign. Dani Alves has been linked with a move to Old Trafford in the summer, but it is thought any club wishing to have the full-back in their ranks will have to hand the 31-year-old a three-year contract. Real Madrid centre-back Raphael Varane has also been linked with a stunning £35m move, while up front it is being reported that Man United scouts have been sent to Portugal to watch Porto striker Jackson Martinez.News of Martinez’s possible arrival follows the increasing pressure on Radamel Falcao, who continues to struggle in front of goal. As you can see below, it is not just in attack where the club are rumoured to be keen to reinforce.Juventus midfielder and former Old Trafford academy star Paul Pogba continues to be linked with a move away from Turin in a record-breaking transfer.If a deal for Alves does not happen, then Southampton right-back Nathaniel Clyne has also been identified as a possible arrival, while Mats Hummels remains a firm target of Van Gaal.Despite playing in midfield recently, Wayne Rooney could be utilised up top again. “I would not say he will always be a midfielder from now on because it depends on the formation we use and the form of the strikers,” Van Gaal said. Given that the Dutchman’s forwards are not firing on all cylinders, then Rooney may be asked to do what he does best: score goals. 1 What area do you hope Louis van Gaal strengthens in the summer?