Currently develop and nonproduct flags are not printed in debug build by -XX:+PrintFlagsInitial, -XX:+PrintFlagsFinal, -XX:+PrintFlagsWithComments and -XX:+PrintFlagsRanges options, because following code exits in src/share/vm/runtime/globals.cpp module:
#define ONLY_PRINT_PRODUCT_FLAGS

void CommandLineFlags::printFlags(outputStream* out, bool withComments, bool printRanges) {
...
   for (size_t i = 0; i < length; i++) {
     if (array[i]->is_unlocked()) {
#ifdef ONLY_PRINT_PRODUCT_FLAGS
       if (!array[i]->is_notproduct() && !array[i]->is_develop())
#endif // ONLY_PRINT_PRODUCT_FLAGS
       array[i]->print_on(out, withComments, printRanges);
...
}

This affects only debug build because in product build develop and nonproduct flags are not printed because these type of flags are constants in product build.