A couple random (and maybe useless, heh) 0-star FKOs:
c5c can link into FKO pretty easily. Edit: You can also do this with f5D if you follow up by doing 2D and kara-cancelling into the FKO (same as the CD setup.)
2D can link into FKO situationally per character. For example, vs Kenshiro, if he is not inside a corner, you can just go 2D->FKO and it will hit (before he can tech.) It catches him out of mid-air so it looks real goofy too (he freezes in his standing get-hit animation about a character height above ground, hah.) If Ken is inside the corner though, the FKO will whiff (he's too high.) Against Shin, you can hit him if he's inside the corner, or if you boost into 2D (the momentum will push you a bit forward after the super flash, giving you just enough reach.) On Souther, it doesn't seem to work at all ever.
Bonus useless combo! You can combo into Tensho Honretsu after a banishing strike if you are distant from the corner (similar to Shin CD->6->AB combo.) You won't get the sexy counterhit damage, though.