When the Talmud asks a question for which no satisfactory answer is evident, it uses the word "teiku" as a way of indicating that we'll have to wait for the coming of Elijah--messianic times--to receive the correct answer. Elijah will resolve our questions and difficulties.
A question is raised: why will we bring our questions to Elijah? After all, the messianic era will include the miraculous resurrection of the dead. That means that Moses will also be among us. Why don't we bring our questions to him, rather than to Elijah? Moses is our ultimate and greatest teacher of Torah.