I think Reinhart will play next year. Draisaitl MAY play. Bennett and Dal Colle definitely need to bulk up more, so unless they go on a crazy off-season program, chance are they will play another year of junior.
For those interested, Tim Murray from Buffalo breaks down the top-end of the draft giving short little summaries on those prospects.
http://audio.wgr550.com/a/89654095/4...tim-murray.htm
Skip to 3:35. Not very long, but interesting enough to have a listen to.