I noticed Rock n Roll Vegas had Mortal Hydration last month when my wife ran it. Thought that was interesting. Their aid stations were marketed as The Feed aid stations so IM must be working with them.
Also, one of the many marketing emails from The Feed has a sample pack for Mortal Hydration. I am guessing this will be announced soon.
Looks like Mortal Hydration has different flavors, the base being 10g/carb with 450mg sodium and the salty being 10g carb with 920g sodium per serving. Maybe IM will be bringing in actual bike bottles (with The Feed printed on them of course).