Well I'm even rustier than I thought on NL so here's two very rough sketches of the layout of the almost Nemesis 2.0 that we were shown.
The station and brakes were in the same place, but I wasn't sure if the lift was in the same place or angled to the left a bit, as after the lift it dropped to the right, in a turnaround similar to Air next door. It looked a bit taller than the original (tree growth?) or it might have just been because the pre-drop was eliminated and/or they would have lowered the plateu so it could have a proper small drop at the top. I couldn't quite tell from the image whether the drop included a roll into it like The Smiler or whether it was a standard drop. It dropped all the way to the bottom of the pit which would have been spectacular. It then swooped to the right, into an immelmann, possibly using the trench that the current helix dives down. A tall zero-g roll took it over to the far side of the pit, followed by a bigger turnaround to the left, skirting the side of the pit, coming back around, down and up into another zero-g roll. Following this it left the pit, sweeps over the midway, and then a helix took it into a trench (The Blade's?). A final corkscrew took it back into the pit and the final corner, climbed back into the brakes in a fairly similar way to current Nemesis although with a bit more of a height difference and closer to 270 degrees.
It was only on screen for a minute or two and I've slept since so it might be off, but it's definitely close enough to get the idea. The use of height was interesting, the first zero-g looked huge and even the final inversion looked quite big, it must have been quite energy efficient. I liked how many elements they reinterpreted and the new opportunities for interacting with guests, and just how they were able to come up with a new layout without any real changes to the landscape, but because it was more spread out and 'bigger' it did make the ending seem more abrupt, even though it must have actually been longer.
If it had been built I'm confident it would have been the best coaster in the country, but it wouldn't have been an improvement. It's a testament to just how good Nemesis and its brand are that even the moneymen realised that rebuilding it made more sense than starting over, establishing a new brand and trying to get even the general public to move on from it.