I dunno if anyone's posted anything about it yet (too tired to go back and check right now), but I'm just back from Day 1 of Japan Expo in Paris. There was notably a panel with Maruyama Masao - which I unfortunately missed due to horrible waiting queues - but from which a friend's provided me with the most interesting bits.
On Sakamichi no Apollon: He's mentioned that they knowingly went all out on the budget for the performance scenes. However, he is aware that they will not be making this money back (just why did you have to bomb, oldtaminA 2.0?), which is already not looking great for the studio's future. He said you shouldn't expect such animated scenes from MAPPA in the future.
Someone apparently also asked why they didn't make use of 2 cours to adapt the manga - he said people had told him from the beginning that even making just 2 episodes of Sakamichi no Apollon would be crazy, so getting one cour was already big enough of a gamble as it stands. Nothing too surprising here.
He's also tackled the issue of Yume Miru Kikai - how the production was really looking to be a big hurdle (people apparently overestimate the amount of work that'd been achieved before Kon's passing away, I don't know much about it myself), and how he still plans on giving his best on it. But he reminded people that he's now 70, and thinks he can still dedicate time in the next three years to work on it, but probably not more. He seemed pretty sad about it.
Finally, he wants to work on 8 1-hour long Pluto OVAs, as it'd be a nice way to end his career - beginning with Astro Boy, ending with another Tezuka work. But I don't remember whether my friend told me if this was actually a project in the works (it might be, considering how he's given precise details regarding the running time) or purely delusional. You might want to wait for a better report by someone who actually attended the talk, sorry!
Now I hope to make it on time for the Sunrise panel on Saturday. >_<