It doesn't particularly pertain to the 25th Anniversary, but I would really like to see an remake of FF5 in the vein of the FF3 and FF4 DS releases. I really think that FF5 would really benefit from a re-make. (And is the last game in the series I really think needs one.)

I think the FF Compilations sounds great on paper, but they have been so ... proficient ... at exploiting any possible opportunities for re-release the market is probably pretty well saturated.