Watchtower answer:
No! Only the 144,000 have a heavenly hope.
Bible answer:
Yes! Matt 8:11, Luke 13:28, and Heb 11:16 assure us that OT saints will be in heaven.
Matt 8:11 And I say unto you, That many shall come from the east and west, and shall sit down with Abraham, and Isaac, and Jacob, in the kingdom of heaven.
Luke 13:28 There shall be weeping and gnashing of teeth, when ye shall see Abraham, and Isaac, and Jacob, and all the prophets, in the kingdom of God, and you yourselves thrust out.
Heb 11:16 But now they desire a better country, that is, an heavenly: wherefore God is not ashamed to be called their God: for he hath prepared for them a city.