Will it be possible to install other sensors in the Beta or Gamma version?

Arri is just about to release the Alexa-Mini, with the same interchangeable mount like the Amira. So there are now at least five different basic mount systems already available: Red, Sony FZ, Amira, P+S IMS and the Taiwanese Allstar.
For each basic mount, every rental place (or owner of several cameras) would have to buy a whole set of secondary mounts (like PL, BNC, OCT19, Canon, Nikon etc.) for the lenses that he is using. This is really stupid. It would make mount adaptors a lot cheaper, if there would be just one system on the market.
So for everybody - users, rental places and mount manufacturers - it would be great not to introduce another 4-screw basic mount system, but to use an existing one.

Red mount adaptors already available, so you can just screw them in and start on day 1.

• IMS: Good point. Too expensive. But maybe it would be a good idea to use an already existing standard like the red mount. It is very simple (4 screws only) and there are already a lot of 3rd party mount adaptors available, some of them rather cheap. And I suppose that you could use it without an expensive license from RED, because for example Wooden Camera is offering a conversion of the BMCC to RED mount for a reasonable price.