Firstly-the rambam holds it is assur to predict it. look in his biur to 13 ikarim #12 [it is in siddur vilna after ani ma`amen. also look at http://www.hebrewbooks.org/pagefeed/14302_249.pdf hayesod 12. [the ramban is cholek on this.]
Mashiach doesn’t come by talking about it the gemara says in chelek 97b
????? ?’ ?????? ???? ?? ????? ????? ????? ?????? ??? ??? ??? ?????? ??? ??? ??? ????? ?? ??? ????? ????? ??? ?????? ??? ???”? ????? ??? ??? ???????? ???? ???? ?????? ????? ????? ??????? ????? translation [found this on the online soncino talmud] R. Eliezer said: if Israel repent, they will be redeemed; if not, they will not be redeemed. R. Joshua said to him, if they do not repent, will they not be redeemed! But the Holy One, blessed be He, will set up a king over them, whose decrees shall be as cruel as Haman’s, whereby Israel shall engage in repentance, and he will thus bring them back to the right path.
WE SEE FROM THIS THAT MOSHIACH ONLY COMES FROM TESHUVAH. IF WE ARE NOT READY HKB`H WILL FIND A WAY TO GET US TO DO TESHUVAH. NOW TRUST ME I WANT MOSHIACH TO COME BUT INSTEAD OF TALKING ABOUT– CAUSE HIM TO COME WITH
TESHUVAH