Max next season, spoilers of course
Of course she'll wake up. Likely Eleven will figure out a way, will probably have to go in her mind and do some maintenance.
But I feel like her waking up is pretty much a given. Because narrative structure. You generally go with the more dramatic/interesting choice. So she either wakes up, or she stays in a coma forever until she eventually dies. Be much more interesting to have her wake up, and maybe have something be different about her. If they were going to kill her, it would've been more interesting for it to just happen in 4x09 instead of going the coma route.