There might be a few routes using the bus terminal at Keele and Finch, depending on what service is run.
I would expect a route to continue to serve the LePage/St. Regis area because the 107 already runs through there, except with the subway extension, I doubt the 107 would run to Downsview, and perhaps taken over by YRT. Then there's the 41. Would it terminate at Finch, or would it be one of 2-3 routes that are supposed to continue to run into York U itself?
Depending on the revised routing, you might be forcing a difficult transfer from bus to LRT, even if buses only serve the street outside the fare paid area, like at Dufferin or Lansdowne, with a set up like at Bloor and Yonge. Remember, there were almost no bus services there (only an infrequent Rosedale-Wellesley or Downtown bus) during that era for transfers.
The Finch West EAs should be starting soon. I guess we will see then.