Hercules: if you want a Hercules figure, take the head and legs of this figure and put them on an X-Men Ultimate Sabretooth torso. Then put on series 3 Thor's arms. AoA Sabretooth's arms will do.
This figure otherwise has little material for customizing and stinks as Hercules.
Planet Hulk is War Hulk with some minor changes. Get it for itself or as a much cheaper War Hulk. The helmet might work on armored Thor. This figure is all I could want.
Emma Frost . . . switch that nasty head with Scarlet Witch, paint the costume scarlet and you've got a nice Wanda.
If I could not make a better head than that, I'd give up. If you want Emma Frost, you'll have to put her together piecemeal from other figures. Maybe give up on the articulation and work from a Chaos Comics female figure.
I have not seen Banshee yet, but I ordered it for the hair.
I do not want Annihilus badly enough to buy Beast. Is there anything else?
Oh, Iron Man is okay. The head is not much use.
Does anyone know why Thor Buster Iron Man is 7' tall? The card has no explanation. I lost the comic book. I bought 3 more very cheap (and very stupid, it's useless to me) so I'll have a look at the comic and see if that explains why the body and head are huge and the face looks like he just ate a hot pepper.