http://www.open-std.org/jtc1/sc22/wg21/docs/cwg_defects.html#583
If there is some feeling or use-case that nullptr < nullptr
should be well-formed, that could be proposed.
What was the rationale for removing it? What was the rationale for keeping nullptr == nullptr? That rationale is what a paper would have to argue against. CWG 583 and 1512 talked about problems with heterogeneous comparisons, not homogeneous comparisons.