Wait what does eveyone mean by "it's Fallout's turn"?
Wasn't the release order like this: TES: Arena, TES II: Daggerfall, Fallout 1, Fallout 2, TES III: Morrowind, TES IV: Oblivion, Fallout 3, Fallout New Vegas, TES V: Skyrim? If you're following that pattern, then the next game should be TES (not including TESO).
Unless you're talking the ones only DEVELOPED by Bethesda...? In which case it's Arena, Daggerfall, Morrowind, Oblivion, Fallout 3, Skyrim? If your following that order, then the next game could be anything, because there's no pattern there. :P
[spoiler]Not trying to argue. Just interested.[/spoiler]