Once again, I don't think City will send "left-overs" but I think that
A. The best city youngsters will have DP wages. i.e Marcos Lopes, Emyr Huws, Bruno Zuculini.
B. Some players are very close to the first team squad and need Premier League/La Liga loans (mainly the same players + Guidetti, Denayer, Rekik and possibly Leigh)
C. Some players need more time in the academy and aren't ready for first team football
D. Some players may not want to live so far away for 6 months or a year (again, likely to be the same players as C)
E. Some players are not good enough.
This makes it difficult to find players that don't fit into these catagories, but the likes of Iheanacho, Angelino, Maffeo, Donyoh, Boateng, Bytyqi, Ntcham, Byrne, Ambrose, Kwakwa, Fofana, Manu Garcia, Hiwula and Bossaerts are all potential signings. Kreis will have his pick from a list of players, and he will have to decide if they are good enough or not, having seen them in training for a year/scouted them out on loan.