Hi Sukhbhat,
DIP means the decision is in progress, so either an approval or a rejection are possible. If his profile and documents meet all the OINP criteria, there´s no reason for the rejection. However, if he is approved, the nomination will only be issued next year, according to the latest update in the OINP site: (
http://www.ontarioimmigration.ca/en/pnp/OI_PNPNEW.html).
"The Ontario Immigrant Nominee Program (OINP) has met its 2017 nomination allocation for all streams. If you have submitted a paid application to the OINP, your application will be processed. If your application is approved, the program will nominate you in 2018 and you will be notified at that time."
Good luck!