When a sinister plot card is reloved, is it removed from the game? In other words, can a sinister plot that was already resolved can come up later in the battle?

I think it is discarded. Each AO has three different Sinister Plots, and there are exactly three Epic Battle cards that ask you to draw one.

Agree with Tibs. Plus my group plays that we never look at sinister plot cards until they come up in battle. So we naturally discard one so we (may) have an opportunity to see another one

Plus the epic battle deck is a "once through" anyway. Randomly distributed through out is the "The End of Everything" card. So you would never shuffle the Epic battle deck and will only see each card a maximum of once.

Lastly, discard them for the fun factor. Why would you want to see the same one more than once? (Unless there are two copies of it, of course).

Tibs said:

Thanks, I thought so. I did the 3+3 math myself but I needed to make sure. Thx.