Wilshere may be granted more game time over the congested festive period, with reports suggesting Arsenal could see their match against Liverpool moved to Christmas Eve for broadcasting purposes.
"I believe Jack is in the best form I have seen him in for a long time", Wenger told reporters at a press conference on Thursday.
Wilshere is out of contract next summer but has performed positively so far in both the Europa League and League Cup and is now pushing for a return to Arsenal's Premier League team.
The 25-year-old made a full recovery from a broken leg prior to the global break, playing the full 90 minutes in the Carabao Cup win over Doncaster Rovers and in the Europa League success at BATE Borisov.
"He has played games since the start of the season and he will play many more".
'I think he's gone a little bit under the radar with Morata [doing so well], but to come in from the French league to a big club in England and score four goals in his first seven or eight games [is very good]'.
His early career has been devastated by injuries but every flicker of form commands attention because of a lack of genuine midfield options available to England boss Gareth Southgate.
The midfielder is fully fit and pushing for Premier League action at the Emirates.
Wilshere has 34 England caps and the last of them came in the defeat against Iceland at Euro 2016.
The Arsenal man has not been in an England squad since last November, but has impressed in his recent performances for Wenger's side. "He can open spaces, he can play in tight areas". Roy Hodgson reportedly believes that Wilshere can play an important role within the squad.