Aura 3 Plans
From the Aura blog:
The Past
Aura 1.x framework packages will see no new releases, and may be archived.
Aura 1.x library packages are near the end of active development; to prevent orphaning and end-of-life, ownership and authority over them they may be transferred to interested parties.
The Present
Aura 2.x packages that are currently stable will remain the center of development attention, with some modifications to Composer and PHPUnit support files, and with added testing on PHP 7.
Aura 2.x packages that are not currently stable will not see stable 2.x releases; they will become 3.x candidate packages.
The Future
Aura 3.x packages will target PHP 5.6, and additionally test on PHP 7.
Aura 3.x library packages will be allowed to depend on interface packages, though not other implementation packages.
Aura 3.x will not provide a framework under the Aura name, although the 2.x framework should be able to use 3.x components. Frameworks of Aura packages may be provided as separate projects.
Aura 3.x and later packages will have independent major version release cycles.
Read the entire post here.