Seller discloses fire after bidding war

[Xin Z.]

I am interested in a house at a good location.  The house is priced right and I got into a bidding war.  My bid is competitive (all cash and no contingency).  After a few rounds of bids, my agent told me that the seller chose my bid.  When accepting my bid, the seller also disclosed that the house had a previous fire which happened before he bought the house.  The seller's disclosure form didn't mention anything about the fire.

I am not sure how to proceed at this time.  Should I ask for an option period to do inspection due to the new disclosure?  I am not sure if this is a fair process, because buyers probably would not have submitted the same bids in the highest and best round should they know about the previous fire.

Any comments and suggestions are very appreciated!