Wish they would release the alpha though so people could see what once was, and is now Gears of War
It was leaked, it can be found very easily
the pre-alpha version? Not in a million years and by this time it would be a better idea to make it 2.5D :)
Surprisingly the 3d version was quite rock hard solid stable, but alas we got Bubsy 3d which kind of killed 3d platformers, unless if you count FEZ as a 3D platformer, maybe 2.5D, I wonder why 3D Platformers arent popular? Hey if this re-release does well maybe we might see a Jazz Jackrabbit 3 using Unreal Engine 4 on the Epic Games Launcher!
Maybe they will release source code to Jazz 3D so the community can finish it
Bubsy 3D was released very early in 3D platformers. Long after it we had games like Spyro the Dragon, Jak and Daxter and Ratchet and Clank. Fez was a decade after these games.
In terms of releasing the source code it's more likely that someone would try to remake Jazz 3D as an Unreal Gold mod.
Tim Sweeny has shown interest in releasing the Unreal 1 engine source code but that hasn't happened yet.