EmphaticPikachu
A tired little girl~
Reading up on the backstory of Didactic, the body he had in Halo 4 was not his original body, his original body was killed before the Forerunners went to war with the flood and he survived through some kind of mind/consciousness transference to another body. Now, assuming there is another Forerunner somewhere there is no reason he couldn't do it again.
Ehhh, I'm not gonna say it's impossible. But there were quite a few complications with that. First of all, Bornsteller choose to let the didact take over his consciousness. And I assume that the next forunner would have to allow it as well And they sent him into exile for a reason, no one really wants a man who gives up individuality for syntheticness. I honestly think he was still alive due to the way he spoke in the legendary ending...Hopefully spartan ops over the weeks to come will reveal more.