Merson spent six years playing alongside Wright at Highbury and he always speaks highly when asked about his former teammate.
Lacazette, who has already said he is honoured to be compared with Wright, netted a debut goal for the Gunners in their 2-0 win over Sydney FC at the ANZ Stadium yesterday.
The Frenchman is expected to continue scoring goals for Arsene Wenger’s team and Merson believes he is in exactly the right place to do so.
Merson, speaking to talkSPORT, said: “He has got big shoes to fill.
“If he gets anywhere near Ian Wright, then he will be a signing and a half, as I say he is a natural goalscorer and he scores goals.
“There is no better club to play for than Arsenal [when] they make more chances than anyone else.”
The former England international also believes that Lacazette will prove to be a big hit following his club-record £52million move from Lyon.
“Lacazette is a goalscorer,” he added.
“He will suit Arsenal’s system. They have always needed a natural goalscorer and that’s what he is.
“The one thing he will do is get a lot of chances and he can score a goal, so I think he will be a success.”