Entitys, Shaders, and Mesh files are a little different in Rebellion. So trinity mods will not work in rebellion. The Forge toolset will have to be updated to be rebellion compatible. Which means there "should" be new versions of Galaxy forge, Particle forge, ConvertData, and ConvertXSI.
Good thing is rebellion is stand alone, and the last planned expansion. So we wont have to worry about older trinity files messing us up.