I think this is pretty much going to be Juve's team for this season and the next 2.
Juventus is still paying the stadium, building Continassa, and paying a shitload of installments for almost every starting player.
I believe that commercial revenues will increase little by little, but not drastically.
So Marotta will have to keep spending low in the next 2 mercatos at least, I reckon. Like 15M a season.
We still have non fundamental and valuable assets to sell and improve the team, like Giovinco, Quagliarella.
So in the next 2 or 3 mercatos I guess Marotta will keep what's done in this one: invest in youth and make 1 or 2 significant signings, having a net spent of around 15M.
In 3 years this team will get old and some important pieces will have to be replaced. So I guess our next mercato spending really big will be in 2016-17. Until there we'll keep our best players and still have a pretty good team, best in Italy and top 8 in Europe. From 2016 on Juve will make the next big step in Europe.