Do you wanna be successfull: Give 500 discount codes to your developers so they gracefully move from 770 to N800. Do you wanna shoot your foot: Give them 500 discount codes and do not activate them for a couple of monthes after the release of the product.
No official when, no offical why.
This way you have the people spending time searching why their codes don't work instead of making their projects run on the new device.
And if you can advertise Canola2 for a month to then at the last minute say you are not releasing because there is an obscure ok reason, then you kill the platform totally!!!
Nobody is going to get angry about the stupid situation, because we all know that if we do we are not going to have a new discount code ever.