with many things have happened in this year, i dont think ETH can reach that much in this time, rightnow ETH is struggling with 300$ and never has the chance to get back up, so it is hard to say ETH can be afford to rise that much when just 3 months from now will be the end of this year.
I have got the same thoughts as yours. Unless there is some extraordinary happening, it would not reach 1500 from 300 in three months.