I’m one of the Herocraft Coding devs (Proof I am part of the HC team), and we have already stated we would be porting Heroes & Herochat over in some fashion. There is currently discussion if it should be as Forge based mods or Sponge plugins. Regardless they will be ported somehow.
http://forums.spongepowered.org/t/porting-heroes-and-herochat/