Sony Blogcast announced "even more Tokyo Jungle characters", which means that the Sabre-tooth tiger and the three "?" DLC icons in the character select list will be/are most likely going to be available. I'd be predicting a bundle for ~$2.50 much like the first two bundles.
Be aware, the announcement is spoiler-ific. Skip to 20:06 to hear it, but there are DLC and general game spoilers.