While there are people still playing the game it's quite clear that it wasn't a commerciale hit especially compared to its predecessors. Actually it' been a huge PR flop, which has made even the most fervent zealots wary of Bethesda's behaviour. Future mistakes of this size could damage the company's reputation in the long term.I would reply with, "What reason would they have to make a new single-player title if the multiplayer game is bringing in more money with less effort?"
Hell, we haven't seen anything for TES VI outside of that one flyover trailer with the title.
That's my opinion at least.