Typically the under aged players who make U17 are bigs. That would put kids like Eric Nissen, Ben McPherson and Jake Livingston as front runners for a spot.
As for U16 that's nearly impossible to predict. That's the provincial team that suffers the most from kids choosing not to participate. Last year's U15 & U15D had a lot of very good players and several that were cut that played very well this past year in JV (ex. Davies from FHS). U16 good be a very good team if everyone came out for the team.