As an avid Dhalsim fan, I will compile some information/theories for and against a Dhalsim inclusion in the initial roster of SFV (More for myself more than anything else)
For:
-Dhalsim has been mentioned in several leak lists and therefore been continued to be mentioned by different members in the fgc when predicting the last classic character. (The lists have not been, and will likely not be confirmed, and I don't believe them to be true, but this is still important for reasons I will mention later on).
-Capcom has stated that there is one "classic character" returning.
-Capcom has stated that a classic character is someone you would expect to see in a Street Fighter game; A main stay that is pretty much almost present.
-The roster is missing a zoning character
-Combofiend stated early on: "Our goal is to make sure there's a character for everyone's style... We want to shy away from clones.". This supports the notion of a zoning character.
-No character has been given a range stat of 5, which is a spot Dhalsim would obviously fill. (
https://pbs.twimg.com/media/CRToCR4WIAAnKAE.jpg)
-A lot of people believe Dhalsim covers a void in the SFV roster that other projectile heavy zoners like Sagat and Guile does not fill as well (I am not confident about this one, but I will come back to it)
-There are plenty of anti zoning tools in the game, but noone it is obviously meant to counter.
-Gief has been added, and Dhalsim often appear with him.
-I personally spoke with a capcom representative and he said I would not be disappointed after telling him I wanted a zoning character and that I wanted Dhalsim.
-It was stated at PAX, by Combofiend that: "after the Mika reveal, there will be at least one more pure grappler and a "really annoying male zoner". (Gief was announced after, and a lot of people consider Dhalsim to be the most annoying zoner of the classic characters. This is third hand information from Adamwoz at Neogaf)
-India has a games exp (IGX) from the 14th.-15th. of November, which is a good opportunity to announce Dhalsim (Kind of like Gief was announced in Russia).
-Dahlgren stated approximately the following when asked what is meant by classic character: "I don't want to give it away entirely. We have been giving a lot of hints, and people who are in the know are pretty smart" (Capcom has been around hinting towards a future zoner for a while, and a lot of people who have been predicting the two characters that are left, have mentioned Dhalsim. This might be what Dahlgren is referring to)
Against:
-Dhalsim is an unhype character for a lot of people (Even with redesign of gameplay, people will be biased against him)
-SFV looks like a game that is meant to be offensive and has a lot of anti zoning tools, which might suggest that they don't want a character like Dhalsim to be in it. (Or that he would be mauled if he is put in the game)
-Dahlgren has stated "not necessarily", after being asked "Classic character isn't limited to sf2 right?"
-The Indian games expo does not have confirmed Capcom presence at this time.
-A leak from Ken Bogard suggests that Zen might be from India, which makes a Dhalsim reveal less likely (
http://www.neogaf.com/forum/showpost.php?p=143302117&postcount=1076). The leak did get Rashid=Africa wrong though, so this needs to be taken with a grain of salt)
Edit: If someone has any information/solid theory that I have missed, please tell me
