Salvatore already explained it.
Kind of. Elkann backed off because of the fans, he was losing the club and he needed to put Andrea as a mascot to protect himself. The money injection was a bit forced as well, he needed to act. Now, he can't do much more than what he did after calciopoli to keep destroying Juve. Inter's sponsors deals and the weak defense in the case is already gone. As long as he keeps supporting Juve with some money, I'm fine with that.
I don't buy conspiracy theories about Marotta, the guy is just incompetent, that's all. Too soft for backstage dark moves.