Depends on which theories and ideas end up actually panning out.

Speaking generally. I’d imagine there’s going to be a push to put the unpleasantness behind us in short order. Probably a new holiday or two and a slew of new memorials. Along with plenty of speeches.

Popular Media will likely trend towards looking forward. I’d imagine there will be a lot of focus around and talk of “New Frontiers” whether space, science etc. I’d imagine Science-Fiction will likely have a resurgence of an interest.

Most of the world’s major churches/religions. Will probably have councils/conclaves or whatever their version of aforementioned gatherings are to discuss events and chart new courses of action and elect replacements where applicable. As I’d imagine more then a few religious leaders of all faiths are going to get well acquainted with a prison cell.

If the rumors of sapient/sentient Human-animal hybrids are actually true. I’d imagine there will be a lot of philosophical and moral debates on the definition of human and where such individuals would fit into our society.

I’d imagine also a slew of medical and technological advances and innovations would see distribution. Development and use of AI will continue and humanity will as always adapt and adjust.

Depending on which theories actually pan out. These thoughts are subject to change.

Some of the theories and rumors I’ve heard get pretty wild. Ranging from basically a Star Trek esc future handed to us on a silver platter. To in essence finding out all the Myths, Legends, and Folklore was all true and we’re propelled into a reality that’s essentially high-fantasy but with modern technology. And everything in between those.