"But if the speculations you talk about are true then as he has just been appointed it is surprising."
The Gunners boss continued: "You can't talk about them because you don't know exactly the atmosphere inside the club.
"For me Newcastle has a big support every time you go up there and you feel there is a great potential within the club - of course, in order to turn things round you need time."
Wenger, though, does not believe Newcastle will be anything other than ready to throw Arsenal's title charge off track.
He said: "I don't read a lot about that [Allardyce] as I prefer just to focus on facing a good Newcastle side - and I believe that every time we go up there you don't come back with points if you don't perform well and that is what we expect from Newcastle.
"When you go up there you always expect a passionate game and we will prepare to face a strong Newcastle side, but again we will focus mainly on our own performance."
