I wonder why Jon Rowlands isn't part of the dev crew? (Nothing against Rob "1/3 of Retrograde" Ellis, of course!)
I can only guess that the development costs for GBA,(or even Sony PSP), would've made them non-starters. But it certainly has potential-roll on the PC version! Which will be turned into a 3D DoomIII-esque GFX visual feast just for Akira!!!