There are some predictions in the Talmud for when Moshiach/Messiah will come. Avoda Zara 9b brings a Beraisa and Rabbi Chanina that say when Moshiach will come (the opinions are a few years apart), ...
The last perek of Sanhedrin lists some people who have no share in Olam Haba. Other people who forfeit their share are discussed in the answers to this question: No Olam Habah for these? My question ...