Conversation so far:
Was I Heard It Through The Grapevine a recording by producer Norman Whitfield?
Producer Norman Whitfield recorded I Heard It Through the Grapevine with various Motown artists.
What other recordings did they make, besides I Heard It Through The Grapevine?
Besides I Heard It Through The Grapevine, the first known recording is with the Miracles on August 6, 1966, though there may also have been a recording with the Isley Brothers
Did a recording of I Heard It Through The Grapevine go missing?
Whitfield intended to record I Heard It Through the Grapevine; however, a track has not turned up – some Motown historians believe that a session may have been scheduled but cancelled
Were there other recordings of I Heard It Through the Grapevine?
Whitfield recorded the song I Heard It Through The Grapevine with Marvin Gaye over five sessions, the first on February 3, 1967, and the last on April 10, 1967.

Question: What was the next recording?
Self-contained rewrite: What was the next recording of I Heard It Through the Grapevine after Marvin Gaye?