New players brought in must make a good contribution to the team so that Newcastle can get out of the relegation zone. Newcastle status changed 180 degrees after being acquired by the prince of Saudi Arabia, the status of a rich team was attached to Newcastle. It is very difficult to imagine that Newcastle will not be able to get out of the relegation zone, because they have to play in the 2nd tier (Championsip) of the Premier League next season. Hopefully that doesn't happen.
Things are not done yet and they still have a chance to improve their form in the rest of the season. I'm sure Newcastle can stay in the Premier League next season, but it must also be supported by contributions and a better team performance. So far they have only collected 15 points from 21 match, so there is a chance to get out of that zone now.
Apart from Newcastle, there are several other teams who are trying to get out of the relegation zone after a series of bad results that befell them. If you ask me which team will stay among the current 5 teams then Newcastle is my choice over the other 4 teams including Norwich, Everton, Burnley and Watford.