I agree with OP. For me they can keep doing mostly as now.
Release some new IPs, contract 3rd party to remake/remaster some PS1/PS2 titles not released yet and perhaps even launch a new title for some of them (Like Syphon Filter).
And sure, open more studios and increase teams size and quantity (I would love PD to have more staff and release a GT in the first year of PS5 and one near the end).
duduspace11 "Well, since we are estimating costs, Pokemon Red/Blue did cost Nintendo about $50m to make back in 1996"
http://gamrconnect.vgchartz.com/post.php?id=8808363
Mr Puggsly: "Hehe, I said good profit. You said big profit. Frankly, not losing money is what I meant by good. Don't get hung up on semantics"
http://gamrconnect.vgchartz.com/post.php?id=9008994
Azzanation: "PS5 wouldn't sold out at launch without scalpers."