I wont speak to the characters mentioned, but I will say that the list contains a few possible characters I've come up with based on some investigation I've done and rumors in the FGC. I do hope and assume they are not final. I'd personally not like to see a MK guest character because it goes against everything they've said about this "not being a Mortal Kombat" game.
But I will say this for certain, because I've heard the rumors going around since this leak, but THERE IS NOT CHARACTER DLC ON THE DISC. There are some of the pre-order skins on the disc, but that's expected since it ships with it and requires no download upon DLC activation. But there are not ANY "yet to be announced" DLC on the disc at all in any form. Lobo and the other characters will have to be downloaded at a later point.
How can I promise this? Well I've looked at the contents of both discs (haven't looked at Wii U disc yet) and here's all the character files on the disc.
Each CHAR_NAME_SKIN.xxx file is for one of the characters, they get a different _SKIN file for each of the various available skins. I haven't done enough digging to figure out what A, C, D, E & V are but they likely map to a certain skin set. I do assume that V is villain for Regime skin though.
All this said though, I have yet to see a human readable INI file as indicated in this "leak". All the files on the disc and in the demo are compressed/encrypted. I know some people are working towards extracting the art asset contents, but I don't have time to do that myself.