While the nexus phone from huawei is now link to have that size memory capacity, LG nexus hasn't say anything yet.
Its hard to blurt something intriguing when it comes to memory capacity, since the Google seems not turning its head towards internal storage. But its a given 50/50 chance that they'll deal with it when those phones are publicly available, I'd to think that way cause of the variations and specs to this phones are jaw dropping. If in case they'll settle it and load it with 128GB of storage, then it'll be the first of its kind. The first in all smart phones running android to be exact.
If I were to ask, I'd not pick the 128GB. I'm sure it will do additional charge if its going to be true, 64GB is quite large for a smartphone. I think its enough for me.