About the new breakthrough ninjas i think next ones should be all the basic konohas (among them there's also kabuto and the 3 sannins in the sannin war version) and the other manual barrier ninjas (gaara, haku, yamato, anko, jirobo), but personally speaking i hope we get gaara (shippuuden), yamato, haku, tsunade (sannin war), kabuto and hinata.