First of all, it isn't possible to come up with an answer for this question unless the tenets of morality are firmly in divine hands and thus independent of human cognition or tendencies. However, any morality designed by God must by definition also be in accordance with human moral thought, because of the Identity Principle; if God's actions are in any way observable, he must be an integral part of the universe, and thus any moral scheme developed through reason would not conflict with God's.
I believe that all who are moral at heart should, if it exists, go to heaven. This opinion is borne more out of sympathy for lifeforms than anything else. The question is deciding who's moral; I guess that's why God's supposed to be omniscient.