There has been one study for a passenger rail connection linking Tavares to Orlando, but it was not done by SunRail. Check out this Wiki link:
https://en.wikipedia.org/wiki/Orange_Blossom_Express" onclick="window.open(this.href);return false;
And here is another link:
http://www.lakesumtermpo.com/regional_i ... press.aspx" onclick="window.open(this.href);return false;
A Feasibility study are not an Environment Impact Study (EIS), which needs to be initiated before Federal funds could be allocated to it. These links are fairly old, and I do not know the result of this study. But it seems all later studies for Lake and Sumter counties involve increasing bus services, so I'm assuming the Orange Blossom Express train service was aborted as the result of this study.