Could we approach the Prisoner Exchange a little differently? What if I sent a small collection of bits to Mordheimer to use in creating a character for use as a hired gun or such?
I could see that Cadian veteran carrying an eldar shuriken catapult, and wearing Tau armor on both shoulders and wielding a hormagaunt scythe like a machete or sword. He's been through so many campaigns that he's got trophies he can use from all the theaters he's fought in, all the battlefields he's ghosted across, striking and snuffing enemies before they have the chance to retaliate.
Then - does the mini go back to the bits provider? That's what I had in mind at the start, what do the rest of you think?