The future of several Barcelona stars is unclear as the club contends with a poor financial situation ahead of the summer transfer window. New manager Hansi Flick has a tough job on his hands as he aims to make Barcelona challenge for major trophies again after a disappointing season saw Xavi dismissed from his role. Several players could be on the chopping block this summer as Flick wields the axe over his squad, but he will be facing budget restrictions when it comes to signing new players. Two loan stars this season, Joao Cancelo and Joao Felix, may return to Manchester City and Atletico Ma…