There is the extremely heated debate over whether to give Guile another special move. I hate to spark this junk up solely to voice my own opinion, but I guess I have a strong one on this.
If Charlie truly is dead, I want Guile to learn his moonsault slash in honor of him. I want to see Guile having it in a future update of SF4. If Charlie truly is dead, I also want to see Guile paying homage to him in some future update by doing a single-armed sonic boom somewhere (maybe if they give characters 2 super options instead of just 1 in a future update).
I am not too familiar with SF Canon, but it seems to me like Charlie is dead and will therefore never be seen in Street Fighter editions that occur after Alpha in their timeline. If this is the case, I want Charlie’s spirit to be carried on in Guile.