The England U21 international is currently taking in a second stint at Championship outfit Sheffield Wednesday.
He has netted four goals during a productive stay at Hillsborough, but will be due back on Wearside when a short-term agreement comes to an end on 1st January.
It has been suggested that Sunderland will then look to offload Wickham on a permanent basis during the winter transfer window.
Poyet has, however, rubbished such reports, claiming that the 20-year-old remains part of his plans.
He will continue to monitor how Wickham is getting on at Wednesday and will make a call on his long-term future once the youngster has returned to the Stadium of Light.
Poyet told the Sunderland Echo: "Nothing's been decided, although it's not something I would usually comment on. But we haven't even talked about that (a permanent departure).
"He needs to play and after he gets back from loan, we will talk with him as well.
"We knew he needed to play a few games and we are keeping an eye on him all the time."
Stuart Gray has already expressed a desire to keep Wickham at Hillsborough, with the Owls' caretaker coach revealing that a loan extension will be explored in the New Year.
He said: "He's our player on loan, at this moment in time it's just fingers crossed we can do something in January."