This pic is via Gootecks twitter. 
 

Is Gootecks trolling us, or is this 4realz?

Interesting. Since they're next to Juri and Hakan, could they be brand new characters?

Is that so?  Hrmm...interesting.  So where did Gootecks play the arcade version of SSFIV that there were two extra slots...that had no one in them...and he was able to snap a photo of?

Hmm...

" Interesting. Since they're next to Juri and Hakan, could they be brand new characters? "

Apperantly, there was a leak in SRK, and the comment got deleted.  
 
[EDIT] made it easy: 
"  Arcade Update announcement of Super Street Fighter IV to include 7 additional characters. Footage of “Alex” and “Rolento” is shown off." 
 
This came from GAF. 

Rolento, Alex and/or Eagle are my guesses. If there are 7 addiontal characters, I wonder if it's gonna be priced or just an update, if an update, flipping capcom! They more than made up for that "supposed" RE incident.

" Rolento, Alex and/or Eagle are my guesses. If there are 7 addiontal characters, I wonder if it's gonna be priced or just an update, if an update, flipping capcom! They more than made up for that "supposed" RE incident. "

" @ArbitraryWater:  they made people pay for dlc that was already on the disc. "

" Rolento, Alex and/or Eagle are my guesses. If there are 7 addiontal characters, I wonder if it's gonna be priced or just an update, if an update, flipping capcom! They more than made up for that "supposed" RE incident. "

Rolento yesssssssssssssssssssssssssss. I will pay 20 dollars just for Rolento. YOU HEAR ME CAPCOM

" Rolento yesssssssssssssssssssssssssss. I will pay 20 dollars just for Rolento. YOU HEAR ME CAPCOM "

" @ArbitraryWater:  they made it an option for people pay for dlc that was already on the disc if they wanted to, while anyone else that didn't choose to pay, still got as much gameplay as everybody else. "

If next year they bring out another version of this freaking game and ask for say another $40 I'm going to be pissed!!!  Just make the extra characters DLC capcom, I don't care if there not given endings, its not like you would allow us to appreciate the endings by remembering to put a gallery in the game anyway!!!

I'm actually already satisfied with the current lineup, I mean I don't get to use all of the characters in every endless lobby, but more is good right? lol! I just hope it's free though to maintain the balance in the game. 
 
I think adding 7 characters is kind of big for a DLC, if it's not in the disc already, coz you have to add the character models, the data for the moves, ultras and especially the update for the game to register these new characters and apply the balancing.  2 to 4 characters kind of sounds reasonable though. 
 
Rolento and Alex seems to be the most common rumor, so I guess they're a given.  Although I find Alex to be kind of a redundant add since Abel's already there, but I guess it's a good matchup.  I hope they also add Elena and Charlie (even if it will be weird for Guile's story hehehe) 
 
I also read somewhere that  there were avatars released on PSN for Alex, Hugo, Q, Elena, Charlie, R. Mika and Rolento.   So maybe, they are the 7 characters that will be added.

Hope they aren't Makoto tier

" Is that so?  Hrmm...interesting.  So where did Gootecks play the arcade version of SSFIV that there were two extra slots...that had no one in them...and he was able to snap a photo of? "

Not photoshopped, go to 10:10