It's a really neat idea. I admire when people seek to close a lot of the plot holes Nintendo has created rather than blindly accepting them. I had a similar idea a while ago that revolved around a similar concept except all the links and Zelda's throughout on fixed timeline in some form or another become aware of the others existence(which is a huge series plot hole). The last of kin or current generation would study the previous generations for inspiration, but also to learn why evil continues to threaten their land. I had many idea revolving around this premise and for me I feel like it would be fitting end to the grand story(something i think should be a consideration before link ends up in space).