Here is my watchlist for each region, each one separated into an A tier and a B tier list (not in any particular order) with A tier meaning could challenge for NXN top 15, and B tier meaning could get to NXN on a good day:
Northwest:
A tier - Crater, Coeur D'Alene, Rocky Mountain, Franklin, Jesuit
B tier - Kamiakin, Boise, Seattle Prep, Eastlake
California:
A tier - Great Oak, Ventura, San Clemente, Trabuco Hills
B tier - Newbury Park, Granada, Crescenta Valley
Southwest:
A tier - American Fork, Herriman, Niwot, Lone Peak
B tier - Mountain View, Corner Canyon, Valor Christian, Riverton
Midwest:
A tier - Noblesville, Downers Grove, Carmel
B - tier - Mason, Plainfield
Southeast:
A tier - Belen Jesuit, University, McCallie, Calvert Hall College
B tier - The Bolles School, Brentwood, Farragut
Northeast:
A tier - Christian Brothers Academy
B tier - Episcopal Academy, North Allegheny
New York:
At least on the guys side, this whole region is looking very weak for next year.
Southlake:
A tier - Southlake Carroll, Jesuit LA, The Woodlands,
B tier - Grapevine, Austin Vandergrift, Coppell