College transfer chances

Hi everybody, I am a freshman at a university in Florida and i was looking forward to transfer to a top school after my sophomore year. I predict that my College gpa will be amazing (probably 3.8-3.9) also my standardized test score, I am retaking SAT in Jan 2017 and I am pretty confident that i will score >1500, but my hs gpa is not great (tbh) so I was wondering that if i apply as a junior, so what are my chances in like: Upenn, Brown or Duke…?

You’re in the Stanford page. Perhaps repost here? http://talk.collegeconfidential.com/transfer-students/