Yeah, but it'll likely be some reused form. Possibly with new frames like Julius had.
Also, this sorta reminds me of the rumor that Hammer was going to be included into DoS Julius mode but they ran out of time. Could we see a long lost sprite sheet of playable hammer?
EDIT NOTE: In case you're wondering "well, aren't their sprites in there then?" I apologize that I made a mistake earlier, and that Julius and Maria, along with the stage, are not actually included into the main download of HD, and are actually separate DLC specific downloads. The DLC files contain the added content, and it is NOT present within the original download. I merely extracted them to the same location by mistake. Again, sorry for the confusion.