D seems unlikely to get a renaissance. These days languages are facing much stiffer competition, and D has never solved its fundamental problems:

It is a rudderless language, that struggles with fragmentation due to the hype-driven addition of half-baked and mutually incompatible paradigms, with a leadership that keeps driving away contributors.

I can’t see how any of this could change while Walter Bright is still in charge, but I also don’t see how the language could survive him stepping down as BDFL