The more realistic "creative use of borders" I anticipate is citing historic claims of (mostly) Poland to carve off a big chunk of Ukraine in the West into a new state, and put it under explicit or implied ("just try and see what happens") NATO protection. I don't expect that unless Russia starts having a lot more success, though, and both they and Ukraine start to signal that they might accept a partition of the country to end hostilities.

[EDIT] Further caveat that it'd have to be before substantial Russian ground forces reach that part of the country. This is still a low-likelihood scenario, but certainly far more likely than declaring part of Poland to be in Ukraine (?!)