The story behind it is certainly epic, and I think you could adapt it's last tour of duty to a 'Mech Scenario as well. Something akin to a small group of Royal 'Mechs trying to fight their way in the first days of the Coup to get the Last Dropship Off Terra, possibly escorting civilians as well. Would make for an interesting excuse to let PCs enjoy the perks of using Royal variants, countered by the fact that they are massively outnumbered and very likely to be overwhelmed unless they keep moving...