but they are incorporating mod ideas from past games into the next installment, better they do that discreetly then base a DLC blatently from another modder. you wanted duel wielding, Hex off and company gave use Dual wielding, we have "fake" duel wielding for years (off hand weapons) and they are bringing that to Skyrim, Beth doesn't have to pay diddly to modders and in essense its the mod Idea they are using and erecting themselves. I do not think they'd go the lenght of copy paste and slap a Beth Tag on it....oh you know what I mean.
Most likely not something like "dual-wielding" because bethesda can do that themselves, but maybe something like an Expansion pack like Nehrim. Bethesda could even provide some voice acting and they'd STILL make money from that.
It's not like Bethesda would pretend like they made it. It could be called fanDLC or something, and credit is given to the Modder