Does each Buddha find a new path? I have a question that I find kind of interesting, and can't find an answer anywhere. Will the next Buddha find a new path, different from the middle way? Or will he rediscover the middle way once it's been forgotten. I think both are possible, but I'm not too sure.
Each Buddha rediscovers the same path and the same truth all over again, on his own.
You can find this narrated in the Pali Canon for Vipassi Buddha (SN 12.4), Sikhi Buddha (SN 12.5), Vessabhu Buddha (SN 12.6), Kakusandha Buddha (SN 12.7), Konagamana Buddha (SN 12.8), Kassapa Buddha (SN 12.9) and of course, Gotama Buddha (SN 12.10).
Furthermore, the Buddha foretold the coming of the future Buddha, Metteyya Buddha or Maitreya Buddha in DN 26 - to do the same.