Yes, Inane, you are...
But what if Notrium 3D turns out to be much better than the original?
It's quite plausible, though 3D and physics present many more problems than were probably taken into consideration in the first place. The 'real' original wasn't actually all that fancy, if it was people wouldn't of kept requesting more and more. Right now they still need to build an engine, than when that's done they can think about making the game. I really do hope it turns out well, but it's a complicated project and I've seen easier ones dropped.
On the sequel, it's probably going to happen, eventually, as Ville said. Though we're working quite hard on Cormoon now and will be into next year. After Cormoon is done, than we'll see how people feel about a sequel. Though next time I'd probably prefer an engine like Snowblind, which would of been perfect for Notrium. Though it'd probably not be 'quite' as impressive as Snowblind, I can see it being done.