"For me, the contract does not have special meaning but, because of the debate, maybe I should have sorted that out earlier", the Frenchman, who is in charge of Arsenal since 1996, said.
Wenger's switch to a back three enabled Arsenal to end the season in style, winning seven of their last eight league games before toppling Chelsea in last Sunday's FA Cup final.
The Frenchman has been at the helm for nearly 21 years and, despite a section of supporters calling for him to depart this summer when his contract expires, he is now expected to further that stay after holding talks with Arsenal's board on Tuesday.
With Arsenal's defence ravaged by injury and suspension, Gunners boss Arsene Wenger handed Mertesacker his first appearance in the starting line-up for 392 days in Saturday's Wembley showpiece against Chelsea. And I don't think Arsene can let go.
After that loss, Wenger said he had made a decision on his future which he would announce "very soon".
With Wenger set to nail down his position in a top job, Corbyn will be hoping to secure one when the public go to the polls on June 8.
"I believe that it's a positive trend, but it would be ridiculous if 20 years depends on one game or the future of the club depends on one game", he said.
The 32-year-old had played only 37 minutes all season after coming off the bench in last weekend's win against Everton.
He told reporters: "You can always say it was a first start of the season and first of being captain".
Morgan also hit out at Wenger's supporters, adding: "To all Arsenal fans who've enabled Wenger's new deal with your simpering acceptance of mediocrity... don't blame me for next two years of failure". The more people that write me off, the stronger I get. Yet at Arsenal he's got total dominance.
"Sanchez is not an out-and-out centre forward, he likes to play wide and come inside, though I've seen evidence this season he can play down the middle and score goals to a high level".