I've always wanted to see a Matrix mission!!
The bullettime and slowmotion is easy enough to do but being able to run up walls is an entirely different story. I would be hard to simulate, also you maybe should rethink about doing it on Nogova as some peoples computers find it hard enough, to run resistance, so add dat in with 50 Zombies/ SWAT guys to be gunned down = slow mission. Which would be no fun at all.
Good idea tho!! ;D