Nothing has been revealed or answered, we have to wait until Ultimate End #5, which is why the delays for Secret Wars are frustrating b/c our only answers are dependent upon an event that keeps getting extended/delayed.
We can assume that Miles father Jefferson and his best friend Ganke will make it. We can only hope that Ult. Cloak & Dagger, and Ult. Bombshell survive and make it b/c their 616 counterparts have done nothing, but collect dust for years.
How are they integrated, are their memories intact? Who knows b/c there is an 8 month timeskip where writers might not have to answer those questions as quickly as they would have if there hadn't been a timeskip.