"Judas died before the Church was born."
Judas left the Last Supper before he received communion, so he lacks the sign of God's grace. The question: Was Judas' suicide a refusal to receive the grace of forgiveness (in which case he is probably in Hell), or an atonement for his sin made out of ignorance of what Christ would do (in which case he may later be raised out of Sheol into Heaven)?
Some intriguing thoughts:
Judas means "Jew." It is promised that the Jews will de grafted on to the tree of life at the end of days.
Even though we pray with a different Judas, the name of Judas is invoked every time we pray for hopeless causes. Judas died of hopelessness.
We we taught by the Blessed Virgin to pray for those most in need of God's mercy.
Even the gates of Hell shall not withstand the Church.