Everything now is in legal, but like the merging of the ARM64 branch into LLVM/Clang which is now a complete merge of all ARM branches, I would expect The Swift Programming language to be added.
It's suicide not to do so.
By the way, the run-time isn't the keys to the company. It's a run-time. The Cocoa Frameworks are the keys and those are public with private APIs. It's what you do with the tools that are the crowning jewels.
Clang would be DOA if it weren't...