BARK BARK BARK BARK BARK BARK BARK BARK BARK BARK BARK BARK BARK BARK BARK BARK BARK BARK BARK BARK BARK BARK BARK BARK BARK BARK BARK BARK BARK BARK BARK BARK BARK BARK BARK BARK BARK BARK BARK BARK BARK BARK BARK BARK BARK BARK BARK BARK
It seems there were three gospels that fit this general category: Ebionites, Hebrews and Nazarenes - all presumably lost. From what I can gather they were quoted by Clement of Alexandria, Origen, Eusebius, Epiphanius, Jerome and Didymus the Blind (but perhaps a few others as well) but likely fell into disuse and/or becoming heretical as orthodox canon was established and are since lost.
My question is: considering the large amount of papyrus fragments in caches such as Oxyrhynchus, Cairo Geniza and Herculaneum but perhaps also other such as Dishna/Bodmer - How likely is it that fragments or entire manuscripts of these gospels are laying waiting for recognition?