Yes, but more than a dream. He was in the Spirit, so his spiritual understanding was greatly enhanced. Still, if one has the whole bible in regard as one reads the revelation of Jesus Christ there is no big mystery. After all, as John says, the point of the revelation is to show Christ’s servants things that will shortly come to pass. If there is confusion, then it’s on the part of the servants. If any man lacks wisdom, he should ask the Lord to give him some.
It would appear that The Lord has given Dispys wisdom that Replacementarians have not received/are not willing to consider remotely fair mindedly and logically.