Ive spent the last two summers working at that plant. Last summer they did some pretty expensive upgrades for the GMT-900 program. Im not sure exactly what upgrades GM would be considering right now, the plant should be ready to build the 900 trucks.
One rumour i heard awhile ago though, was that GM was considering building the crew cab version of its full size trucks there. Currently, that plant only builds the regular and extended cab trucks. I know for a fact they had a crew cab delivered from michigan to see if it was feasible.
Also, Fort wayne is the only plant that builds hybrids. So maybe GM is planning on increasing its hybrid capactiy?