Sylar would be intresting, but Hollow Ichigo or atleast some of his earlier more frantic battles as he gets to grips with his new powers -- that would be awesome
I first discovered Celldweller when he supplied a remix of Own Little World on a game called XGRA (a future based racing game), after tracking down tracks I finally managed to import the self titled album

Really great stuff, and features heavily in all my playlists (alongside TDG), and yet so many of my friends whom claim to be music no-it-alls have never heard of Clayton and his work...which I find odd...especially since he has cocntributed to so many TV spots and movies etc etc (I nearly died when Frozen was played during a trailer for Constantine)
I am currently spamming his remix of Propane Nightmares...which I prefer to the original