So, we are now down to likely 2 inning programs (with new cards) remaining, so here is my guess as to where the remaining 99s (I am going to leave out the 98s for now, ie Edmonds/Miller/etc).
BR - I think we are done with new rewards for the year. Less people playing and the BR gods likely playing less too. I think they end it with Alomar and Wagner.
WS - I think there might only be 1 more season with new cards (based on last year). My guess for next season is Gehrig and Gibson.
Inning Programs - I think we get the following in the last 2 inning programs: Mays, Honus, Griffey, Foxx, Gossage, Bench
I think Pujols is going to be a easy moment giveaway when he ties/passes Mays (assuming he does).
I think Chipper will be the final event reward card.
That leaves high 90s of Eddie Murray, Cy Young, Mathewson, Dale Murphy, Edmonds, Miller, Irvin, Nen, Vida, Vizquel, Brooks, Andruw Jones, Lee Smith, and several others for Henchmen, events, pennant race, etc.