For me it's 2Bomb
>>716454151
Not just in her appearance but her ability to explode (non lethally)

>>531748904
and this is an example of someone that either hates collabs all together or NieR specifically

>>714367327
I do hope that if he is working on another game then it's a completely different character set/space to Nier, if not another world entirely.
As much as I like 2B and want her to sit on my face and self destruct, that story is pretty much done.