When people say the brain of their setup it usually refers to the bit of gear that sequences and links to all other gear so I’m guessing a groovebox that has a lot of connectivity. Links with software and hardware, possible ios connectivity also
When they asked while back about what you like us to make my reply was a groovebox with synth and drum engines, fx and sequencing so that’s my hope
Buarp Behramid
Octrack owners will be happy!
Or a Bicrobreak with Plaits Algorithms…
It already exists, its Drambo for iOS 
The bcr-2000 plus zaquencer? I thought the bought the code or did a partnership.
Behold the field in which I plant my fucks and see that it is barren?
Toraiz Squid clone
Getting that Modwave clone to market ahead of Korg. Nice.
HoneyBadger don’t care
That was my first thought too.
To me, “brains” would mean a central processing system, e.g. a sequencing capability to rhythmically control other parts of the “body”, i.e. other gear. Soon ™.
If it is a sequencer I wonder if it’ll have B-locking.
Mutable clone.
Betwig
B(M)PC with free DAW
The marketing looks similar to their teasers for the WING mixer. No idea what to do with that but there it is.
A proper midi implementation on all their synths?
What’s the deal with a brain if all you can send is a handful of commands? 
Behringtakt