I doubt if we will sign anyone. I think that Mike Ashley has decided that as we are looking safe from relegation, he doesn't have to spend any more cash this season. Taking into account our injury situation and the probabilty of Tiote and Barton receiving further bans (due to accumulating yellow cards), he may feel that a european place is outside of our reach, so won't boost the squad numbers.
I do not think that we are still safe from relegation, but I am trying to guess what Ashley is thinking.
I still believe that Ashley will try to sell the club in the summer and so does not wish to put too much more of his own capital into the club. He will get the same price whether we finish 9th or 13th, so why spend on the team.?