With Watson due back at the DW Stadium at the beginning of January, a decision needs to be made on his future and talks are due to take place in the coming weeks.
Martinez has revealed that other clubs have shown an interest in the former Crystal Palace player, who only joined Wigan last January, and so there are choices to consider.
"We're going to speak with Ben as soon as his loan finishes and we'll decide how he feels about the whole situation," Martinez told the Wigan Evening Post.
"We had a few other clubs that approached us with the idea of having Ben.
"The most important thing is to see how he has developed since he has been at QPR and we'll make a decision then."
Watson was signed by ex-Latics boss Steve Bruce and so is not necessarily a part of Martinez's plans, and the current Wigan manager will be thinking about all of the fringe players in his squad during January.
"It's always a possibility in any squad," he added. "You always get players who want to play every week and sometimes they feel like they need a fresh challenge.
"I'm delighted that we don't have to sell players to balance the books, that's the best news for our fans. If there is any movement, it will be for the good of Wigan Athletic.
Martinez is also looking to reinforce in the winter window, adding: "It is important in January that we help the players that we have already got in with a couple of new faces that can help us in bringing a different dimension in our play.
"All sides get one or two injuries and in the second half of the campaign you normally get suspensions. We need to make sure we are as strong as we can be."
Martinez, though, has indicated that Olivier Kapo has a future at the Wigan if the midfielder proves his worth.
The Spaniard said: "He has had a bit of a stop-start season and at the moment he's a member of Wigan Athletic and I want him to carry on fighting for his place and that's important."