Sources close to Adobe that have been briefed on the company's future development plans have revealed this forthcoming announcement to ZDNet:
Our future work with Flash on mobile devices will be focused on enabling Flash developers to package native apps with Adobe AIR for all the major app stores. We will no longer adapt Flash Player for mobile devices to new browser, OS version or device configurations. Some of our source code licensees may opt to continue working on and releasing their own implementations. We will continue to support the current Android and PlayBook configurations with critical bug fixes and security updates.
Additionally, the e-mail briefing to Adobe's partners has been summed up as follows:
Adobe is Stopping development on Flash Player for browsers on mobile.
Adobe is now focusing their development efforts on:
Applications for mobile
Expressive content on the desktop (in and out of browser)