TheTigerMaster
Superstar
I think it would have a lot more ridership than Sheppard. It would be a fast line from mississauga to downtown.
When the TTC studied the Eglinton West LRT a few years ago, they found that ridership in the segment would be in BRT range. Considering that Tory wants only 3 stations along Eglinton West, I'd be surprised if 5,000 persons per hour use those stations along Eglinton West.
That said, SmartTrack has a direct downtown connection, so that does change the situation significantly. This is why it needs to be studied. But either way I don't expect usage to be high enough to make subway construction permissible (~10,000+ pphpd)