This summer could be huge for Real Madrid.

The team, which is still the leader in Spain and could repeat the Champions League, might have a completely different roster next season if transfer rumors are to be believed. 

According to numerous sources, Real Madrid could be shipping out Isco, Jese Rodriguez, Asier Illarramendi, Raphael Varane and Iker Casillas to make way for Paul Pogba and David De Gea. But would the team really make such wholesale changes if it manages to finish the season on a high with two trophies?

Conventional wisdom would state that teams keep the groups that make them successful together. But that is not always what drives Los Blancos. Last season, the world thought Madrid's midfield of Angel Di Maria, Luka Modric and Xabi Alonso was elite and good enough to lead the team in 2014-15. But instead the team went after James Rodriguez and Toni Kroos, thus spelling the end for Di Maria and Alonso. The results have been solid thus far, though not quite as appetizing in recent months. 

A year earlier, the team brought in Isco and Asier Illarramendi. Both sat on the bench for most of 2013-14 and, in the case of Illarramendi, the bench is still his most consistent home on the pitch. 

The team recently added Lucas Silva to the midfield and it is already clear that he is ahead of Illarramendi on the depth pool. With Modric and Rodriguez due back soon, the midfield is about to become very crowded. Khedira's fate is all but sealed and he will leave this summer. Illarra is likely not sticking around anymore. 

Things get more interesting with Isco. Coach Carlo Ancelotti recently proclaimed his admiration for Isco and even went so far as to state, "If Isco is ready, he will always play. His presence on the XI is undisputed if he's healthy." So, why sell him? According to reports, Manchester City is interested in replacing Samir Nasri with the Spaniard at the center of its midfield. It is a rather shocking choice considering that overall, Nasri, despite being older than Isco, is actually better in all passing statistics this season than the Spaniard. Nasri averages more key passes per game (2.5- 1.6), better passing completion rate (90.3-88.4), more passes per game (59-50).That said, Isco is clearly more versatile with stronger defensive statistics overall. The Spaniard averages 1.9 tackles per match while Nasri averages just one per game. Isco also leads in interceptions per game (0.7-0.3). Isco is also a superior dribbler. 

For Manchester, adding the balanced Spaniard to the offensively gifted David Silva in the middle of the park is a huge boost. 

So what of Real Madrid? Isco is in the top five on the team in such stats as Key passes, assists, passes per game, through balls per game, dribbles per game, shots per game, total goals and tackles per game. In sum, he has been arguably the team's most consistent performer. So why give him up? Pogba is projected to be a superior player in the not-to-distant future. His numbers currently have nothing on Isco's, but the Juventus star is a bigger body with tremendous skill. If he hits his projected ceiling, then he might be a steadying presence in the midfield, albeit without the creativity. 

But that is arguably why Madrid has James Rodriguez. The Colombian is among the tops on the team in assists, key passes per game and even goals scored. Isco might be a better dribbler, but Rodriguez does not need to be that versatile for Madrid to thrive. Throw in Lucas Silva, who is also quite versatile, and this team should be set for years to come in the middle of the park. 

The move that makes little sense, however, is the departure of Raphael Varane for Manchester United. The French defender is yet to hit his prime and averages more clearances per game than any other player on the team. He does have to battle mainstays Sergio Ramos and Pepe for a starting spot, but both are not likely to be in peak form for too many years. At age 21, Varane still has a long ways to go before hitting his prime and he is arguably the most consistent centerback on the team at this very moment. 

The Casillas departure is no shocker. De Gea is a top keeper and it is only a matter of time before Casillas is forced out of Spain's capital. He has not had a great year (albeit not a horrid one either), but the younger De Gea is in finer form and a better candidate for Madrid going forward.

All statistics from WhoScored.com.