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Shadow Priest
I'm pretty sure most of you know about this already.
I stole this from SF4 forums.A scan of the arcade flyer for Super Street Fighter 4's arcade release may be hinting at new characters being added to the game, as the text "Here comes new challengers?!" is shown near the bottom.
Ryan "Gootecks" Gutierrez posted back in May back in May that he heard from a "strong source" downloadable content (DLC) characters would be added to SSF4.
Capcom's Yoshinori Ono has made statements saying it's possible from a technological standpoint as well.
Super Street Fighter 4arcade location tests arcade location tests start this weekend in Japan, and we should know fairly early on if any new characters are added to the roster.
Now here is hope for Charlie,Rolento and Elena.
Edit!! http://img52.imageshack.us/img52/5499/rioteer.png