Well i'd say there is a good chance, after watching the anime street fighter alpha generations.
It is inferred once in the alpha movie and more again in alpha generations, but is not necessarily canon. All we know for certain is that Gouki killed Goutetsu, master of Gouki and Gouken, and Gouken, master of Ken and Ryu (but not really, since Gouken makes an appearance in SF4). And no, Gouki didn't change his name to Akuma because of any similarities with the name Gouken, it was changed when the game was brought to America because "Gouki" didn't sound demonic enough.
What nuts have you been eating? OF COURSE NOT! Ryu's actual father is unknown, but his foster parent is his master, Gouken (aka Akuma's brother.) So in a way, AKUMA IS RYU'S UNCLE.
no akuma is formerly known as gouki and trained with ryus master, gouken however akuma was swallowed up by the dark hadou and mastered its ways therefore killing his master goutetsu.
Akuma killed Ryu's (and Ken's) master.
theres lots of them shin akuma shin vega akuma m bison sagat ken ryu birdie zangief evil ryu super ryu
Ryu is the main protagonist and both Akuma and M. Bison are antagonists.
Akuma - Street Fighter - was created in 1994.
Well Capcom never officially and directly tell us, but there are many hints. Like in Street Fighter 4 ending of Akuma and a mini rival conversation where he (Akuma) said "Prepare to meet your maker."
Evil Ryu isn't confirmed yet, but due to the large amount of similarity between him & Akuma, plus the large amount of fan-hype for the "Evil Ryu VS Devil Jin" match-up, I wouldn't be suprised if Evil Ryu was indeed Akuma's partner. So until Evil Ryu's finally confirmed, GO SATSUI NO HADOU MY FRIEND.
I believe they are available from the start. I think you have to buy them... otherwise it depends onwhere you get it...
Evil Ryu appears in Super Street Fighter 4: Arcade Edition.
You have to move files like ***.obj and ***.fce and ***.uc1 and ***.uc2, to the files you want to swap with. So if you want to swap like Ryu and Akuma you have to put those four specific files from ryu files, and place it on akuma folder, delete Akuma's files obj,fce,uc1,uc2, and make ryu's obj,fce,uc1,uc2 files and rename theme to akuma's. (you can drag more than obj,fce,uc1,uc2, files and remember to back up)
read the complete details here - http://j.gs/1010114/sf4-unlock-characters
yes- you have to unlock him
No he is not. Evil Ryu is only present in Street Fighter Alpha 2,3, and Capcom vs SNK 1 and 2