Not that I think these will be who we have left, but assuming all our UFA are moved out at the deadline, or cut loose at the end of the season and we couldn't trade any of our long-term contracts and re-signed all RFAs...
JvR - Kadri - Komarov
Lupul - Bozak - Winnik
? - Holland - ?
? - Froese - ?
Horton
Phaneuf - Gardiner
Rielly - Hunwick
Marincin - Robidas
Harrington - Corrado
Bernier
?
The only players not locked down in an NHL position from the current roster might be Froese, Marincin, Harrington, Corrado.
I think we're looking at 2-3 Marlies post-deadline, and another 2-3 debuting next season: the post-deadliner options are likely the ones who've NHL'd before: Leivo, Percy, Panik, Carrick, Loov, Leipsic, Hyman; 2016-17 will add to the group Nylander, Marner, Matthews/Chychrun/Puljujarvi, Soshnikov, Brown.
I don't see any reason to bring up Nylander this year that wouldn't be counter-productive to patient building/picking higher.