The City of Toronto, Metrolinx together with the Toronto Transit Commission (TTC), are planning:

Scarborough Subway Extension

The extension of the Bloor-Danforth subway from Kennedy Station to Scarborough Centre will help to make Scarborough’s urban node more accessible to Scarborough residents, and to people from across the Toronto city region.
Visit: Scarborough Subway Extension Project Updates 

Eglinton East LRT

The City of Toronto and the Toronto Transit Commission (TTC), coordinating with Metrolinx, are working to bring rapid and reliable transit to Scarborough. Planning is underway for the Eglinton East Light Rail Transit (LRT) line, which will extend from Kennedy Station on Eglinton Avenue East, Kingston Road and Morningside Avenue, to the University of Toronto Scarborough Campus with a future extension to Malvern. Visit: Eglinton East LRT Project Updates