It's out, the new New Beetle is going to be rear-engined! It will be
a variant of the 3-door Next, which begins production late next year.
There will be a wider 4-door and a 6-seater Next variants as well.

I don't know what the engine layout will be, but probably an 800
(parallel?) twin and 1.2 turbo triple. Flat, no doubt.