As Vaughan continues to mature, the benefits for a station at Jane & Major Mac are becoming increasingly stronger. Yes, it would be at its ridership peak during the summer months, but Wonderland continues to shift closer to a year-round destination. Last year, the park was open between May and January.
Canada's Wonderland is also working on a plan to redevelop portions of its parking lot into a hotel/ resort area to accommodate guests from farther away. A subway extension supports the park's goals by increasing access, so parking can be converted. Connecting tourists who may be arriving via Union or Pearons to the subway network would be ideal. Outside of peak season, having these hotels built right beside a subway station is a major plus for ridership.
Major MacKenzie is an existing critical transit corridor for the region and is located more closely to existing residential areas in Vaughn compared to VMC and Hwy 407 (even a potential Vaughan Mills/Rutherford station). While there are projects in the GTA that would yield a greater benefit, there is merit for an extension to Jane & Major Mac.