One. Seeing as how they might be throwing old school fans a crumb with this album I suspect a solo from Hanh.
I hope zero. Unless if it's like this 10 minute long epic thing (not happening). I'm just not a big fan of instrumentals that are 2-3 minutes long. I usually listen to them and wish they had vocals, haha.
it was confirmed by Rolling Stone to have rapping and another article to have vocals (i think MTV article).